In the 100 freestyle semifinals, the world record of 47.24 was bettered first by Alan Bernard with a time of 47.20, and then by Eamon Sullivan with a time of 47.05. Federica Pellegrini bettered her own 200 freestyle world record from 1:55.45 in the heats to 1:54.82 in the final. Michael Phelps bettered his 200 butterfly world record from 1:52.09 to 1:52.03. Stephanie Rice bettered the 200 IM world record from 2:08.92 to 2:08.45. And finally, USA bettered the 4×200 freestyle world record from 7:03.24 to 6:58.56.