A day after Mollie O'Callaghan set a world record, another Australian swim great has lost her global benchmark at a World Cup short-course meet in the United States.
O'Callaghan returned to the pool at the cup meet in Westmont, Illinois, on Sunday night after claiming the 200m freestyle short-course record 24 hours earlier.
But in the final of the 100m freestyle, the Queenslander couldn't catch American star Kate Douglass, who broke the short-course world record held for eight years by Australia's Cate Campbell.
Douglass won in 50.19 seconds - 0.06 inside Campbell's 2017 time - with O'Callaghan finishing second in 51.44.
Douglass became just the third swimmer to hold three individual short-course world records in different strokes.
The 23-year-old now holds short-course benchmarks in the 100m free, the 200m breaststroke and 200m individual medley.
Her compatriot Gretchen Walsh (50m free, 50m/100m butterfly, 100m individual medley) and Canada's Summer McIntosh (400m free, 200m 'fly, 200m medley) are the others to achieve the feat.
Also on Sunday night, Australia's Lani Pallister logged an emphatic victory in the women's 800m freestyle.
Pallister won in eight minutes 02.02 seconds, finishing a massive 10.55 seconds clear of the next-best, New Zealander Erika Fairweather.
And Australia's five-time Olympic gold medallist Kaylee McKeown edged her fierce rival Regan Smith in the women's 200m backstroke final.
McKeown, a day after suffering a rare defeat to the American in the 100m backstroke, touched in a personal best time of 1:58.86 to shade Smith by 1.21s.
McKeown's swim is the second-quickest in the event, behind Smith's world record of 1:58.04 set last year.
