Sun Yang, pictured in 2011, is geared to lower the world record in his Olympic duel with Asian rival Park Tae-Hwan in the 400m freestyle at the London Games, his Australian coach Denis Cotterell said ... more 

Sun Yang, pictured in 2011, is geared to lower the world record in his Olympic duel with Asian rival Park Tae-Hwan in the 400m freestyle at the London Games, his Australian coach Denis Cotterell said Thursday less