Michael Klim and Matthew Dunn each won two events as Australia collected six victories on the first day of the two-day World Cup in Malmo, Sweden.
Klim defeated Jamaican Sion Brinn to win the 100m freestyle in 48.86 and later clocked 24.13 to take the 50m butterfly ahead of Sweden’s Ola Fagerstrand.
Dunn won the 400 IM by more than three seconds from Swedish runner-up Mikael Johansson and then beat teammate Robert van der Zant in the 100 IM, with a time of 55.43.
Adrian Radley added to the Australian tally by winning the 100m backstroke in 53.60 seconds and Natasha Bowron won the 800m freestyle over Swede Asa Sandlund.
But fellow Australian Scott Goodman, world short-couse champion and 1996 Olympic bronze medalist, had to settle for second place in the 200m butterfly, nearly two seconds behind Finland’s Vesa Hanski who won in 1:55.39.
China’s women swimmers won four events and lead the way in four of the six women’s categories.
Guo Wei joined teammate Nian Yun at the top of the sprint freestyle section by winning the 200 freestyle in 1:58.04, while Mi Tong, who won three events in Espoo, Finland, earlier in the week, edged out Sweden’s Hanna Jaltner in the 100m breaststroke to increase her lead in the breaststroke category.
Chen Yan strengthened her grip in the IM category by winning the 200 IM ahead of Sweden’s Louis Karlsson but now trails teammate Jia Yuanyuan in the backstroke category after Jia earned 10 more points with victory in the 50.
Travis Myers, the only American on the World Cup circuit, tied Portugal’s Jose Couto in the 200m breaststroke after finishing second to German world short-course record holder Mark Warnecke in the 50m breaststroke.