Team USA capped off the 2025 swimming world championships by setting a new world record in the women's 4x100 medley on Sunday.

Summer McIntosh, the 18-year-old Canadian swimming star, rolled to victory Sunday in the women’s 400-meter individual medley, setting a world-championship record and winning her fourth individual gold medal of the event.

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.

In other events, Gretchen Walsh became the first American woman to 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. 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.