Kyle Chalmers landed his second gold medal of the FINA Swimming World Cup in Berlin on Saturday (2 October), with an comfortable victory in the men's 100m freestyle.
Showing no signs of fatigue from his 50m free victory the night previously, the Australian Olympic champion from Rio 2016 stopped the clock at 45.73, almost a second ahead of Jesse Puts (Netherlands) and Blake Pieroni (USA) in second and third respectively.
Chalmers' compatriot Emma McKeon landed her second medal of the World Cup with silver in the women's 50m butterfly.
A day after landing the 50m freestyle title, the woman who won four Olympic gold medals to be crowned the most decorated female swimmer Tokyo 2020, touched home in 25.10, just 0.33 behind her compatriot Holly Barratt.
Reigning 100m fly Olympic champion Maggie MacNeil of Canada rounded off the podium in third place.
MacNeil was back in the pool soon after, where she finished second in the women's 100m backstroke behind Louise Hansson of Sweden, while Canadian double Olympic silver medallist in Tokyo Kylie Masse came third.
On a good evening in the pool for Australia, Madison Wilson claimed gold in the women's 200m free, ahead of second-placed Slovenian Katja Fain and Isabel Gose of Germany in third.
Elsewhere, Germany's reigning 10km open water swimming Olympic champion Florian Wellbrock secured an impressive win in the men's 1500m freestyle.
ROC athlete Kirill Martynychev and Germany's Sven Schwarz in second and third respectively.
Tokyo 2020 silver medallist Arno Kamminga won a thrilling men's 50m breaststroke, beating German Gabian Schwingenschlogl in a photo finish, while Slovenian Peter Stevens sealed bronze.
Dutchman Kamminga then made it two from two by winning the men's 100m breast, out-touching Schwingenschlogl into second place again while Germany's Lucas Matzerath came third.
There were also two gold medals for South Africa. The first came in the men's 200m individual medley, where Matthew Sates finished ahead of second-placed Danas Rapsys and Yakov Toumarkin of Israel in third. Then in the final individual race of the evening, London 2012 Olympic champion Chad Le Clos took gold in the men's 200m butterfly, with Tom Shields of the USA taking silver and Hungary's Hubert Kos in third.
Finally, the USA finished the evening with a win in the mixed 4x50m freestyle relay. They finished in 1:31:50, which was +0.82 ahead of Germany in second, while Hungary finished in third.