China's Cao Yuan and Zhang Yanquan compete in the men's synchronised 10m platform final diving
1620 GMT: Tom adds: "Yamamuro hops onto coach's back and is carried off. He won all-around bronze at 2011 World Championships and would be a big loss."
"Standings after second rotation: 1. China; 2. Ukraine; 3. Japan; 4. France; 5. Great Britain; 6. Russia; 7. USA. Damaging rotation for USA."
If you want to follow our gymnastics expert on Twitter, he's @tomgymnastics.
1615 GMT: More from Tom at the gymnastics: "Leyva falls off pommel horse. Big blow for the USA, on their weakest piece of apparatus. He top scored all-around in qualifying as well.
And this, two minutes later: "And now Koji Yamamuro completely botches his vault and lands flat on his face before limping off. Team GB unscathed so far."
1610 GMT: Tom adds: "Uchimura, the favourite for individual all-around gold, gets Japan off to a good start on the vault with a score of 15.900."
1605 GMT: GYMNASTICS: Back at men's team final...AFP's Tom Williams writes on Twitter: "Standings after first rotations: 1. Ukraine; 2. Great Britains; 3. Japan; Russia; 5. United States; 6. China.
"Britain off to the rings now, but Germany up first. USA and Russia on pommel. China and Japan on vault.
"China's three vaulters unable to stick any of their landings perfectly but difficulty ratings mean they earn some very big scores."
1555 GMT: RUSSIA'S ISAEV WINS MEN'S UNDER-73KG JUDO GOLD. Mansur Isaev beat Japan's Riki Nakaya to claim Russia's second gold medal in the Olympic judo competition.
Mongolia's Nyam-Ochir Sainjargal took a bronze with a win over Dex Elmont of the Netherlands while France's European champion Ugo Legrand beat Wang Ki-Chun of South Korea to claim the second bronze.
1550 GMT: JAPAN'S MATSUMOTO WINS WOMEN'S UNDER-57KG JUDO GOLD. Kaori Matsumoto took top place after Romania's Corina Caprioriu was disqualified for making an illegal attack from behind.
American Marti Malloy beat Beijing champion Giulia Quintavalle of Italy with a brilliant foot sweep (kouchi-gari) to claim bronze, with the other bronze going to Automne Pavia under the watchful gaze of French president Francois Hollande.
1545: Despite the tickets controversy IOCPresident Jacques Rogge was full of praise when he spoke to British PM David Cameron today, noting the "huge crowds that have turned out for these Games so far."
"The athletes are competing in venues full of colour and atmosphere, which is marvellous to see, and the fans are enjoying every moment of the competitions they have waited so long to see," he said.
"The venues are superb; the sport is riveting and compelling; city festivities are exciting, and the public’s passion and enthusiasm for the Games is remarkable."
1540 GMT: It will be interesting to see whether the gymnastics venue gets filled after yesterday's fiasco over tickets, where soldiers were invited to fill empty seats in the qualifications.
More unused Olympics tickets held by international sports federations will go on sale to the public, London 2012 organisers promised earlier. Some 3,000 Olympics tickets from the federations were "put back in the pot" and sold to the public Sunday, LOCOG said amid growing public anger over swathes of empty seats at events.
1534 GMT: Tom Williams adds: "China and Japan had been expected to duke it out for gold in the men’s gymnastics team final, as they did in Beijing four years ago, but they were outstripped by the United States, Russia and Great Britain in qualifying.
"Team GB’s sure-footed showing in qualifying has raised hopes of a first team medal since 1912, and the British gymnasts are certain to receive raucous home support throughout the afternoon."
1529 GMT: GYMNASTICS: AFP's gymnastics expert Tom Williams says The North Greenwich Arena – otherwise known as the O2 Arena – has been gradually filling up ahead of the men’s gymnastics team final.
The early birds were treated to an unexpected performance from English singer Pixie Lott," he reports. "Standing in the middle of the floor mat and wearing a red dress, she sang ‘Use Somebody’, by American band Kings of Leon, but the British fans don’t seem to mind. Lots of Japan flags scattered around in the crowd."
1523 GMT: HOCKEY: In a blow for the British women’s hockey team, captain Kate Walsh underwent surgery on a broken jaw today on an injury suffered during the hosts' 4-0 opening win over Japan on Sunday. She was accidentally hit on the jaw by a stick while making a tackle four minutes from time on Akane Shibata.
On the men’s side, results are now in for some of today’s matches: South Korea 2-New Zealand 0; Australia 6-South Africa 0; Spain 1-Pakistan 1.
1518 GMT: In more tennis news... Roger Federer is into the third round with a swift win over France's Julien Benneteau.
AFP's Steven Griffiths reports: "Roger Federer hardly needed to break sweat on Centre Court as the Wimbledon champion eased into the third round of the Olympics with a 6-2, 6-2 victory over Julien Benneteau. World number one Federer took just 58 minutes to seal his win and set up a last 16 clash against Gilles Muller or Denis Istomin."
1512 GMT: TENNIS: While that thrilling diving event has been playing out, there's been plenty of action on the courts at Wimbledon. Former world number one Andy Roddick defeated Slovakia’s Martin Klizan 7-5, 6-4 in a round one tennis match held over from Sunday due to rain. He’ll go on to play world number two Novak Djokovic for a place in the last 16.
In the women’s competition, world number one Victoria Azarenka, of Belarus, beat Romania's Irina-Camelia Begu 6-1, 3-6, 6-1 on centre court, setting up a clash with Spain's Maria Jose Martinez Sanchez in the last 32.
Meanwhile Venus Williams, who crashed out against Elena Vesnina in the first round of Wimbledon last month, had better luck at the venue today. She demolished Italian ninth seed Sara Errani 6-3, 6-1 in 63 minutes in another match held over from a rainy Sunday. She goes on to play Canada's Aleksandra Wozniack for a place in the last 16.
And Wimbledon champion Serena Williams moved into the third round with a 6-2, 6-3 victory against Urszula Radwanska. She will now play Russia's Vera Zvonareva or Francesca Schiavone of Italy in the last 16.
1504 GMT: We've just seen another triumph for China in the men's synchronised 10m platform DIVING. They took the gold, with silver going to Mexico and bronze to the United States. Hosts Britain came in fourth.
I'm handing over now to my colleague Ruth Holmes, who will update you on some of the other events and take you forward to more aquatic finals this evening.
1500 GMT: A gold for the Chinese duo of Cao Yuan and Zhang Yanquan in the men's synchronised 10m platform diving and they grin broadly as their rivals congratulate them.
A disappointment for hosts Britain, who were also denied a hoped-for gold in the cycling men's road race two days ago.
London mayor Boris Johnson a few moments ago tweeted: "At the Aquatics Centre, cheering on @TomDaley1994 and @PeterWaterfield. Come on boys!" He looks disappointed now as well.
1459: The British pair earn 91.80 for their final dive, placing them in fourth. They would have needed total perfection to be back in the running.
"Let's finish this off and we can get out of here," says the BBC's disgruntled commentator.
Another disappointment for the hosts.
1458 GMT: "OMG watching men's 10m synchro on TV... SO EXCITING!!!" tweets Australia's Matthew Mitcham, who won a gold in Beijing in 2008 in the 10m platform.
1452 GMT: Here's how the leaderboard looked going into the final round:
1. China 387.42
2. Mexico 377.70
3. United States 368.43
4. Great Britain 362.85
5. Russia 362.19
1450 GMT: The Chinese finish their programme with 2 1/2 somersaults and 2 1/2 twists.
Grins from their coaches and 99.36 from the judges for this one -- they look headed for the gold!
1445 GMT: The Brits earn 87.69 for their fifth dive. That leaves them still in fourth place, six points behind a bronze medal. China still leading, then Mexico then the United States.
1444 GMT: Here's what the leaderboard looked like after round 4:
1. China 294.54
2. Mexico 285.63
3. US 283.29
4. GB 275.15
5. Russia 273.13
1440 GMT: The leading Chinese duo have 387.42 after a totally synchronised fifth dive. It's tense in the aquatic centre now.
1439 GMT: No such a great fourth dive from the British duo! They look unsynchronised on their reverse 3 1/2 somersault.
They get 71.28 for this round which places them back in fourth place behind China, the USA and Mexico after the fourth round.
Disappointed faces from Daley and Waterfield.
1438 GMT: A 4 1/2 somersault from the Mexican duo earns them 95.94 points for this round and wows the audience.
1435 GMT: Into round four. Other teams, including the Cubans and Ukrainians, also putting on impressive performances.
1428 GMT: A backward 3 1/2 somersault from British duo Tom Daley and Pete Waterfield! British prime minister David Cameron grinning and applauding in the audience.
Brits now in prime position with 203.88 after the third round -- Chinese just behind on 201.40.
Bookmaker Ladbrokes tweets: "Tom and Pete now just (odds of) 10/3 (from 12/1) to win the Synchronised 10m #diving. Can they do it?"
1422 GMT: For those joining us now, we're currently absorbed in the men's synchronised 10m platform DIVING. Some more elaborate action now as we're into third dives.
The Chinese earn 89.38 points with their back 2 1/2 somersault with 1 1/2 twist. They're vying with Britain for the lead spot.
1420 GMT: Great Britain into the lead!
A smooth reverse dive with pike gets them slightly ahead of China's Cao Yuan and Zhang Yanquan with 112.80.
Now the second round is complete, we're into the more challenging dives.
1414 GMT: Back to the DIVING -- we're on the first of six dives for each pair.
They'll get more complex as they proceed -- meaning they can score higher but there's also more potential for mistakes.
The duo with the highest score after six rounds get the gold, and China are the favourites.
Now onto second dives...
1413 GMT: A brief diversion to the TENNIS, where AFP's Steve Griffiths reports that it's plain sailing for Swiss great Roger Federer so far against Julien Benneteau on Centre Court.
The world number one, who is bidding to win singles gold for the first time, took the first set 6-2 and has just broken the Frenchman to move 3-1 ahead in the second, says Steve.
1412 GMT: Germany, the United States, Mexico and then Britain's Daley and Waterfield. The crowd love it! 56.40 from the judges.
Britain in equal first place with China.
1411 GMT: The Russian pair score 52.0, followed by the Chinese pair with a forward dive in the pike position that earns them 56.4 points from the judges.
1410 GMT: Russian duo Victor Minibaev and Ilua Zakharov start the diving.
1400 GMT: The crowd at the aquatic centre roars with anticipation as Britain's diving partners, Tom Daley and Pete Waterfield, enter the venue.
1350 GMT: Reports of loud squeals from female spectators at the aquatic centre where divers including Britain's 18-year-old Tom Daley are preparing for the men's synchronised 10m platform diving.
Daley, who competed in the Beijing Games aged only 14, is something of a heart-throb here.
About ten minutes until the diving starts.
1335 GMT: British Prime Minister David Cameron sweeps past one of our reporters with his entourage, heading past the designer stores of the Westfield shopping centre to the Olympic Park.
Perhaps he's on the way to support Britain's diving contenders.
1333 GMT: Excitement building ahead of the DIVING -- UK Sport tweets: "Men's synchronised 10m platform competition starts at 3pm (1400 GMT). Good luck @TomDaley1994 and @PeterWaterfield!! #Diving #GoGB."
1331 GMT: Our reporter Steve Griffiths sends this from the TENNIS:
"World number one Roger Federer is quickly into his stride on Centre Court as the reigning Wimbledon champion breaks France's Julien Benneteau in the second game of the first set of their second round match.
"Federer struggled against Benneteau at Wimbledon last month, losing the first two sets before fighting back to win a dramatic third round clash, but he is in the groove at the moment, leading 3-1 in the opening set."
1329 GMT: A disconcerting day for some fans, who settled in to watch the rowing and archery only for their seats to collapse under them.
Olympics organisers have been checking the welding on 200,000 temporary seats across venues after some temporary seats proved not up to the task.
Our sympathies to any spectators who found themselves unexpectedly on the floor.
1320 GMT: World TENNIS number one Victoria Azarenka has had a scare against Romania's Irina-Camelia Begu today, but recovered from her second-set lapse to reach the second round 6-1, 3-6, 6-1.
Azarenka, who replaced Maria Sharapova at the top of the world rankings after reaching the Wimbledon semi-finals, raced through the first set in just 24 minutes.
The 22-year-old from Belarus, playing in her second Olympics, found Begu a tougher nut to crack in the second set as the world number 79 broke twice to level the match.
But Azarenka, the reigning Australian Open champion, rediscovered her rhythm in the final set. She'll be up against Spain's Maria Jose Martinez Sanchez in the last 32.
1315 GMT: Police say they've arrested 29 people on suspicion of ticket-touting since the start of the Games.
Eleven of those have been charged with the offence including a German man, 57, and a Slovakian woman, 30, Scotland Yard says.
1310 GMT: Greek JUDO champion Ioulietta Boukouvala claims she was bitten by her Cuban opponent after losing in the first round today.
Boukouvala, 29, is quoted on Greek sports websites as saying Yurileidys Lupetey Cobas, who went on to win the contest, bit her on the hand and should have been penalised.
One of Greece's leading hopes for London glory, the European silver medallist and gold medal winner in the World Grand Prix event in Amsterdam this year, Boukouvala shows reporters the hand she said was bitten by Cobas.
"I feel that injustice was done, that I was robbed. What can I say, I could be wrong. God will be my judge," Boukouvala says.
1307 GMT: London Mayor Boris Johnson tells Sky News television that International Olympic Committee chief Jacques Rogge took public transport to get to the Games park today.
He used the Docklands Light Railway to get to the park rather than being whisked through by road on the special Games lanes, said Boris.
"Jacques Rogge himself today took the DLR, I'm proud to say, and was conveyed in stately style and comfort he'd expect on the DLR, and a lot of them are doing that and that is good news."
He's clearly relieved that the anticipated transport chaos has, so far, not materialised...
1300 GMT: SWIMMING: The excitement of the 2012 aquatic events is being heightened by swimmers erasing the world records of the high-tech bodysuit era at a clip few expected prior to the Games.
After predictions that barely a handful of world marks would fall in London -- compared to 25 at Beijing four years ago -- three records have fallen in the first two days of action at the aquatics centre.
Even if the hectic pace doesn't continue over the eight days of competition, that more than doubled the number of world records set since the buoyant, muscle-supporting polyurethane suits were banned by FINA in 2010, Rebecca Bryan reports for AFP.
1457 GMT: The sight of empty seats at Olympic events has been breaking the hearts of sports-hungry Britons, and now it seems one of them has its own Twitter account.
"Day 3: Still empty," tweets the seat.
"Where did it all go wrong? They say it's the organisers' fault, but I blame myself."
Earlier it explained: "My grandfather was a seat in the 1948 Olympics. He made it sound so grand. I wanted to follow in his footsteps."
1455 GMT: Richard Eaton reports for AFP from the TABLE TENNIS that gold medal favourite Zhang Jike has brushed aside suggestions that the new Olympic rules would make it harder for China, after making an impressive winning start in the men's singles.
The world champion from Qingdao cleverly outplayed a former Chinese compatriot, Bora Vang, now the world number 71 from Turkey, and went on to rebut other players' assertions that China will be under more pressure in these Games.
Those claims follow the change which allows only two players per nation in singles events, ensuring that China's medal monopoly in Beijing will not be repeated.
"I don't think there is more pressure," said Zhang, after his 11-8, 11-8, 11-5, 11-7 win. "I am confident that the winner will still be Chinese."
1445 GMT: SWIMMING: Arne Ljungqvist, medical commission chief for the International Olympic Committee, says it's "sad" that media are speculating about the sources of Chinese swimmer Ye Shiwen's amazing success.
"For me, it is very sad that an unexpected performance is surrounded by suspicions," he told a briefing.
"I mean to raise suspicion immediately when you see an extraordinary performance -- to me it is against the fascination of sport.
"To suspect someone for having done something because he performed extraordinarily is a bit sad for Olympic sport."
Britain's Times newspaper this morning labelled Ye's Saturday 400m individual medley victory , in which the split time for the final 50m beat Ryan Lochte's, "scarcely credible".
And the Daily Telegraph said: "Chinese swimming has such a shameful history of doping that any remarkable achievement by one of its athletes is inevitably met with cynicism."
Ye Shiwen topped the 200m medley qualifiers earlier today.
1235 GMT: TENNIS: Australia's Lleyton Hewitt has battled into the second round of the Olympics with a hard-fought 6-3, 4-6, 6-3 win over Ukraine's Sergiy Stakhovsky over at Wimbledon.
Hewitt's world ranking has sunk to 158 after several years of injury problems and the 2002 Wimbledon champion needed a wild card to make it into the Games.
1225 GMT: Our BOXING reporter Charles Irwin is at the ExCel arena today, and says the two sisters of Aussie flyweight Jackson Woods are there to watch him fight.
They're very nervous, the pair tell him -- "we flew in yesterday and saw him last night."
They won't have long to wait, as the 19-year-old is up first against Algerian Samir Brahimi.
1215 GMT: Some 3,000 Olympics tickets from international sports federations were "put back in the pot" on Sunday night and sold to the public, say organisers embarrassed by rows of empty seats despite huge public demand.
But one of our reporters seeking to apply for tickets (purely for research purposes of course) found that the website simply crashed.
"We are currently experiencing high demand and the page you have requested is temporarily unavailable," it said.
Britons, who have truly caught Olympic fever, seem unlikely to forget the issue until those seats are filled.
1214 GMT: Back to SWIMMING, and Michael Phelps tweets after easing through his heats in the 200m butterfly, "Nap time..."
1210 GMT: SHOOTING: Romanian crack shot Alin Moldoveanu wins the men's 10m air rifle title.
World champion Niccolo Campriani bags the silver, while India's Gagan Narang gets bronze.
Moldoveanu, who qualified for the final with an Olympic-record-equalling score of 599, held his nerve to finish strongly and deny Campriani, notching a total of 702.1 points to the Italian's 701.5.
1208 GMT: Leaving the poolside for a moment, in JUDO the top two seeds Wang Ki-Chun of South Korea and Japan's Riki Nakaya have progressed safely through the early rounds of the Olympic judo men's under-73kg category.
1145 GMT: For anyone joining us now, it's a day of aquatic thrillers at the Olympics -- see below for a recap of the morning's events and prepare yourself for these finals later:
+ 1400 GMT: Men's synchronised 10m platform diving, in which hosts Great Britain hope star Tom Daley can challenge for honours with partner Peter Waterfield
+ 1843 GMT: Men's 200m freestyle final, pitting the US' Ryan Lochte -- who opened the Games with a dominant victory in the 400m medley -- against China's 400m free gold medallist Sun Yang, French relay hero Yannick Agnel, South Korean star Park Tae-Hwan and world record-holder Paul Biedermann of Germany
+ 1850 GMT: Women's 100m backstroke, with Australian Emily Seebohm -- who flirted with the world record in the heats -- up against Chinese world champion Zhao Jing and world silver medallist Anastasia Zueva of Russia
+ 1858 GMT: Men's 100m backstroke, with American Matt Grevers, who dipped below the 53-second mark in the men's 100m back semis, at the head of a strong field that includes France's world champion Camille LaCourt and British hope Liam Tancock
+ 1915 GMT: Women's 100m breaststroke, with Ruta Meilutyte, the 15-year-old Lithuanian who set a European record in the semis, trying to cap her dream run with gold as she vies with reigning Olympic champion Leisel Jones and former world record-holder Rebecca Soni
+ In a non-aquatic bonus' the men's team artistic gymnastics final is at 1530 GMT, with China and Japan trying to put poor qualifying displays behind them to challenge for gold.
1130 GMT: Here's a quick recap of this morning's main Olympic news...
+ China's 16-year-old phenomenon Ye Shiwen topped the 200m medley qualifiers and, in response to media speculation, said there was "no problem with doping" in the Chinese team
+ Michael Phelps, trying get his sputtering Olympic campaign in gear, cruised into the semi-finals of the 200m butterfly
+ Swiss cyclist Fabian Cancellara said he will fight through the pain to defend his Olympic time trial crown on Wednesday after an injury in the road race two days ago
+ British rowers Katherine Grainger and Anna Watkins broke the Olympic record as they qualified for the final of the women's double scull
+ Indian Olympic shooting champion Abhinav Bindra crashed out of the Games, finishing 16th in the men's 10m air rifle qualifying rounds
+ Police admitted they had lost a set of keys to Wembley Stadium -- but don't worry: they've had the locks changed.
1110 GMT: ROWING: Britain's Katherine Grainger and Anna Watkins have broken the Olympic record this morning as they qualified for the final of the women's double scull at Eton Dorney.
The double world champions and gold medal favourites beat the previous mark, set by Germany in Barcelona 20 years ago, by nearly five seconds as they won their heat in six minutes 44.33 seconds.
Grainger, 36, and Watkins, 29, beat world bronze medallists New Zealand into second spot, around two lengths behind at the Buckinghamshire course.
The double are now unbeaten in 22 consecutive races and their victory will have laid down a marker to their nearest rivals Australia, who pushed them close in the final of last month's Munich World Cup regatta.
1105 GMT: SHOOTING: Indian Olympic champion Abhinav Bindra crashes out of the Games, failing to repeat his feat in Beijing, where he became his country's first individual gold medallist.
Bindra, 29, was in contention to reach the final of the men's 10m air rifle competition at the Royal Artillery Barracks but slipped down the rankings to finish 16th in qualifying. Only the top eight go through to the final.
The Indian, who has slipped to number 20 in the world, fell away towards the end of the session, and admits: "It didn't go well in my last 10 shots."
"I'm looking forward to going home. I've been away for six weeks," he says. "I'm looking forward to being with my family for a while."
1100 GMT: Amid Ye Shiwen's stunning rise, Chinese teammate and Olympic butterfly silver medallist Lu Ying is critical of China's restrictive training methods compared with the freedom of working out in Australia.
Lu, 23 -- who finished runner-up to American Dana Vollmer in Sunday's 100m butterfly final -- has spent time training in Australia and gives a rare insight into the closed world of Chinese swimming.
"Before training they (the Australians) go and have fun, they are not afraid of being tired before training," she says.
"In China, before any competition, you have to be rested and focused and you can't think of anything else.
"It is really different in Australia, I think our way of thinking has many limits and we set the limits.
"They (Australia) have an enthusiasm for swimming which makes me feel different and you ask yourself 'do you train for yourself or someone else?'"
1055 GMT: On Ye Shiwen, Australia's dual Olympic medley champion Stephanie Rice gets into the debate, reports AFP's Robert Smith.
Referring to Ye's slashing 400 medley win at the weekend, Rice says: "Insane. That split coming home was out of control, faster than everyone but Michael Phelps, I think."
Asked whether Ye's swim was legitimate, Rice adds: "I have no idea, I wouldn't want to get into that at all, but a 58(secs) is an insanely fast swim (last 100m), but I know she's a good freestyle swimmer.
"I swam next to her at worlds in the 200 IM last year and she came home over the top of me in that freestyle leg and I'm not exactly a bad freestyler, so she's a gun in freestyle."
1047 GMT: Phelps' compatriot Ryan Lochte is on typically upbeat form this morning as he prepares to chase more gold in the 200m freestyle final.
"Good morn LOCHTE NATION!!! thanks for all the great support!" he tweets.
"U guys are the best. How is everyone??"
1045 GMT: Michael Phelps says he's happy with his fifth-placed time in the opening heats of the 200m butterfly, reports AFP's Robert Smith at the aquatic centre.
"I think getting last night (freestyle relay) out of the way was something that I needed, I got to bed pretty late," he says.
"We're all excited, I am pretty happy about this morning, that is all I need to be."
The 200m butterfly was one of the record eight golds he won at the last Beijing Games.
1042 GMT: SWIMMING: Back to China's 16-year-old Ye Shiwen, who has continued to dazzle this morning, topping the 200m medley qualifiers.
She says after her swim: "I feel more confident now after my (400m medley) win and I am very satisfied with my performance this morning."
There has been intense speculation in newspapers today on whether her extraordinary final leg swim in Saturday's final was fair.
But Ye says: "There is no problem with doping. The Chinese team has a firm policy so there is no problem with that."
1025 GMT: CYCLING: Audiences felt Swiss cycling star Fabian Cancellara's pain when he crashed in the men's road race two days ago, injuring his arm and shoulder.
But Cancellara says he'll fight through the pain to defend his Olympic time trial crown in two days' time.
Crucially, his collarbone wasn't fractured in the crash. He says today that he's "still in pain" but will be at the start line of Wednesday's 44 km race around Hampton Court Palace.
1020 GMT: Britain's Hannah Miley, currently 10th in the tables for the women's 200m individual medley tables dominated by Ye Shiwen, tells the BBC of Ye: "It's nuts. She's amazing.
"I can't do anything about it except be awed and proud I can race against her."
1010 GMT: SWIMMING: Women's 200m individual medley heats now. Sixteen-year-old Chinese rising star Ye Shiwen easily wins her heat in 2.08.90, equalling her winning time from the World Championships last year.
She's the one to beat. This is the girl whose split time for the final 50m of her world-record-breaking 400m individual medley victory on Saturday beat Ryan Lochte's -- an Olympic first.
1005 GMT: Oops. Police have confessed they've lost a set of keys to Wembley Stadium, where Olympic football is being played.
Officers searching the stadium in London ahead of the start of the Games misplaced the keys, apparently, prompting an investigation by Scotland Yard.
But organisers insist security has not been compromised. The keys were for internal doors, they say, and relevant locks have been changed -- after police spent some time hunting around the stadium for the keys.
Well, we all know that feeling.
1000 GMT: SWIMMING: Phelps is fifth fastest overall in in the men's 200m butterfly qualifiers, en route to the semi-finals at 1930 GMT tonight.
He certainly doesn't seem to be dominating the pool as he did in Beijing.
0950 GMT: JUDO: AFP's Barnaby Chesterman reports: "They're not fighting each other but right now at the judo competition, Israeli Josef Palelashvili and Maher Abu Rmilah of the Palestinian territories are on the mat at the same time.
"There are of course two fighting areas in judo."
0938 GMT: SWIMMING: Michael Phelps is third in 1:55.23 in his 200m butterfly heat. Dinko Jukic, of Austria, wins the heat.
0930 GMT: There have been concerns about possible transport chaos today, with Londoners back at work, more big Olympic events and the legendary creakiness of the transport infrastructure here.
But so far no chaos has materialised -- reports indicate it's actually quieter at major stations than on a normal summer workday. Huge sighs of relief from organisers, we imagine.
0915 GMT: Action now underway at the aquatic centre. The US's Missy Franklin comes second -- in 1:57.62 -- to Italy's Federica Pellegrini (1.57.16) in her heat of the 200m freestyle. Semi-finals this evening.
Let's hope her parents were able to see it. Fellow swimmer Christine Magnuson, who failed to qualify for Team USA, tweets: "Can someone please hook up @FranklinMissy's mom and dad with some better tickets?!?! She had binoculars."
0900 GMT: SWIMMING: French swimmer Amaury Leveaux, one of the quartet that bagged France its first ever gold in the prestigious 4x100m freestyle relay last night, tweets: "It doesn't stop there!"
"The gold seekers," he adds -- with an Instagram picture twinning an image of a gold miner with himself holding yesterday's medal. High hopes for today, then.
0835 GMT: Also not happy: the Australians. Media down under are this morning lashing out at the failure of their world champion men's 4x100m freestyle relay team to win an Olympic medal, calling it one of the country's greatest swimming disasters.
0830 GMT: Dissatisfaction with the Games so far from one quarter -- the medal-less Germans.
"Even the Kazakhs are laughing at us," screams Bild, Europe's most widely read newspaper, on its front page, according to our Berlin bureau.
The paper prints an Olympics medal table showing sporting powerhouse Germany with nothing to show for its efforts.
"Man (and woman), are we bad," it adds, after a string of disappointments culminating in world record-holder swimmer Paul Biedermann's failure to qualify for the 400m freestyle final.
"Even the Kazakhs are laughing. They've already got two golds," the paper complains. Ouch.
0825 GMT: DIVING: "After the toughest year of my life, today is the day! I just want to thank everyone for all their support no matter what the outcome x," tweets British diver Tom Daley.
"If anyone wants to watch...myself and @PeterWaterfield will be competing in the synchro at 3pm on BBC1 today! Aaaahhhh!!!" (That's 1400 GMT.)
Daley, who competed in Beijing in 2008 aged only 14, aims to deliver an emotional triumph, just two months after the death of his father from cancer.
0820 GMT: The elaborate Olympic cauldron was relit at 7am (0600 GMT), after AFP confirmed it was extinguished while it was relocated to another part of the stadium last night.
The outage raised eyebrows as the cauldron traditionally burns for the entirety of each Games.
But don't panic-- the flame was kept burning in a lantern used during the torch relay, organisers said.
0810 GMT: Some highlights to look out for today:
+ Swimmer Michael Phelps begins the defence of his 200m butterfly title, an event in which he has held the world record for a decade (heats 0930GMT; finals 1830GMT)
+ Ryan Lochte targets his second gold medal, lining up in the 200m freestyle final against China's Sun Yang (1843 GMT)
+ Great Britain and Argentina clash in the men's field hockey, after recent tensions between the two nations on the 30th anniversary of the Falklands war (1800GMT)
+ British diver Tom Daley looks to honour the memory of his father -- who died of cancer in May -- as he and teammate Pete Waterfield go for gold in the 10m synchronised event (Starts 1400GMT)
+ The first medals in artistic gymnastics will be decided with the men's team final
+ Twelve medals are up for grabs today, including four in swimming, as the Olympics gets into full swing.
WELCOME TO AFP'S LIVE REPORT on the London 2012 Olympics on Monday 30 July, with today's top events featuring aquatic stars including Michael Phelps, Ryan Lochte and Tom Daley, as well as the men's artistic gymnastics final.
Two world records fell in the pool last night, while China surged clear at the top of the Olympic medals table with wins in shooting for Guo Wenjun and synchronised divers Wu Minxia and He Zi.
Stand by for a rundown of today's major events, with times, in a few minutes.