The United States set the world record in the women's 4x100 metres medley relay at the world championships in Singapore on Sunday. Regan Smith, Kate Douglass, Gretchen Walsh and Torri Huske's time of 3:49.

The United States set the world record in the 4x100 freestyle mixed relay, clocking 3 minutes, 18.48 seconds in the swim world championships.

Americans have won eight gold medals thus far at the 2025 World Aquatics Championships in Singapore, which ends Sunday.

In other events, Gretchen Walsh became the first American woman to ever win gold at the world championships in the 50m butterfly. Regan Smith and Claire Curzan took silver and bronze, respectively, in the women's 200m backstroke. Jack Alexy's bronze in the men's 50 freestyle was his third medal of the 2025 world championships.

Canadian swimming phenom Summer McIntosh was unable to beat American star Katie Ledecky in the women's 800-metre freestyle at the world championships on Saturday, ending her quest to win five individual gold medals in Singapore.

Canada's Summer McIntosh took the bronze medal in the 800-metre freestyle at the world swim championship in a three-way duel to the finish.

The 21-year-old added the 50m backstroke silver to his 100m gold and 200m silver, thus becoming the only man to reach the podium for all three backstroke events at these championships.

Yu Zidi, a 12-year-old Chinese athlete, has become the youngest swimmer in history to win a medal at the World Aquatics Championships. China won bronze in the 4x200m freestyle relay at the Championships in Singapore, and while Yu did not swim in Thursday’s final, she qualified for a medal after swimming a leg in the heats earlier in the day.

The gold medals were spread around on Friday at the swimming world championships, thanks to the absence of stars Léon Marchand of France and Canadian Summer McIntosh from any finals on Day 6 in Singapore.