Robert Hurley of Australia broke the short-course world record in the 50-meter backstroke Sunday at a World Cup swim meet.
Hurley finished in 23.24 seconds Sunday to take three one-hundredths of a second off the previous mark set by Thomas Rupprath of Germany.
The Australian Institute of Sport swimmer said it was the first time he had worn a full bodysuit in competition.
"It was very unexpected but I am very happy," Hurley said. "Hopefully I can translate that into long course and really step up and make the team (for the Rome world championships) next year."
Elsewhere, Olympic 1,500-meter champion Oussama Mellouli of Tunisia won his sixth race in six tries at the two-night meet.
Mellouli won the 200- and 1,500-meter freestyle and the 200 individual medley.
On Saturday, Mellouli won the 400 freestyle and individual medleys over 100 and 400 meters.