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 on August 2 , 2006 . Eamon Sullivan regains the 50-meter world freestyle record in Sydney . The U.S. swimmer won his first gold medal of this Games with a time of 52.44 seconds to claim gold. Frenchman Alain Bernard recorded a time of 21.50 seconds four days earlier .
Eamon Sullivan regains the 50-meter world freestyle record in Sydney . The U.S. swimmer won his first gold medal of this Games with a time of 52.44 seconds to claim gold. Frenchman Alain Bernard recorded a time of 21.50 seconds four days earlier .