SYDNEY, Australia (AP) _ Libby Trickett set a world record in the 100-meter freestyle at the Australian swim championships, finishing in 52.88 seconds Thursday.

Trickett, formerly Libby Lenton and competing for the first time under her married name, beat the 53.30 mark set by Germany's Britta Steffen in Budapest, Hungary, on Aug. 2, 2006.

It was actually the second time Trickett broke the 53-second barrier, but her previous time of 52.99 at the Duel in the Pool in Sydney last year was not ratified by swimming's governing body because she was swimming against American Michael Phelps.

"I cannot say how much I wanted to do that," Trickett said. "Ever since Duel in the Pool last year I've just wanted it so badly and to see it officially up there is just amazing."

It was the second world record of the night at the Sydney Olympic Park Aquatic Centre Eamon Sullivan earlier set one in the 50 free, finishing in 21.41 seconds.

Sullivan broke the mark of 21.50 seconds set by France's Alain Bernard at the European championships last weekend in Eindhoven, Netherlands.

Copyright 2008 The Associated Press.