The men's 50m backstroke world record fell in the semifinals when Britain's Liam Tancock touched in 24.08 seconds, shaving 0.25 seconds off the old standard held by Randall Ball.

Jiao Liuyang competes at the women's 4x100m medley final during FINA World Swimming Championships in Rome, Italy, Aug. 1, 2009. China won gold and set a new world record with 3:52.19.

In the women's 800m freestyle final, Denmark's Lotte Friis took gold in 8:15.92 and Briton Joanne Jackson won silver, 0.74 seconds behind. Italian 1,500m champion Alessi Filippi picked up bronze in 8:17.21.

Earlier, Brazilian Cesar Cielo Filho added the gold in the 50m freestyle to the 100m gold.

In the women's 50m butterfly, Australian Marieke Guehrer claimed gold in 25.48, beating Chinese Zhou Yafei into second by nine hundredth of a second.

Chen Huijia (up) jumps into pool at the women's 4x100m medley final during FINA World Swimming Championships in Rome, Italy, Aug. 1, 2009. China won gold and set a new world record with 3:52.19

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