Summer McIntosh won her fourth gold medal of the World Aquatics Championships in Singapore with a dominant performance in the 400-meter individual medley.

Summer McIntosh has continued to make Canadian history at the 2025 World Aquatic Championships in Singapore.

Summer McIntosh captured her fourth gold medal at the world swimming championships by winning the 400-meter individual medley on Sunday in Singapore.

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

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 US topped the medal table as the women’s 4x100m medley relay team set a new world record on the final day of competition in Singapore

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

Summer McIntosh capped arguably the best world championships for a female swimmer, while the U.S. broke the women's 4x100m medley world record in the final event to finish with one more gold medal than rival Australia.

McIntosh, of Canada, opened the world swimming championships in Singapore with a dominant win in the 400-meter freestyle — the first of five events she hopes to claim gold in.