The swimming competitions at the 2025 World Aquatics Championships concluded with the USA setting a new world record in the women's 4×100-meter medley relay on Sunday, while China delivered strong performances to secure two silver and two bronze medals, ending the swimming events in Singapore with two golds, six silvers, and six bronzes.

The USA stormed to victory in the women's 4×100-meter medley relay, breaking its own world record in 3 minutes, 49.34 seconds. Australia settled for silver in 3:52.67, while the Chinese quartet of Peng Xuwei, Tang Qianting, Zhang Yufei, and Cheng Yujie clocked 3:54.77 to take bronze.

Tang, silver medalist in the women's 100-meter breaststroke at the 2024 Paris Summer Olympics and reigning world champion in the same event, claimed silver in the women's 50-meter breaststroke in 30.03 seconds. The title went to Lithuania's Ruta Meilutyte, who touched the wall first in 29.55 to clinch her fourth consecutive world title in this event.

"This silver was within my expectations. Ruta is a top-class athlete, and there's a lot I can learn from her," said Tang.

In the women's 50-meter freestyle, Cheng took bronze in 24.28 seconds, just behind her compatriot Wu Qingfeng, who finished in 24.26 to snag silver. The gold went to Meg Harris of Australia, who posted a triumphant time of 24.02 seconds.

Canada's 18-year-old prodigy Summer McIntosh capped off her campaign with a fourth gold medal, winning the women's 400-meter individual medley in 4:25.78, a new World Championships record. China's 12-year-old rising star Yu Zidi finished fourth in a personal best 4:33.76.

McIntosh had earlier won the 200-meter butterfly, 200-meter individual medley, and 400-meter freestyle, in addition to collecting bronze in the 800-meter freestyle. Yu also placed fourth in both the 200-meter butterfly and 200-meter individual medley, setting personal bests in all three events.

France's Olympic champion Leon Marchand added a second gold in Singapore, winning the men's 400-meter individual medley in 4:04.73, following his world record-breaking performance in the 200-meter individual medley earlier in the competition.

Elsewhere, Tunisia's Ahmed Jaouadi claimed gold in the men's 1500-meter freestyle in 14:34.41, adding to his 800-meter freestyle title. In the men's 50-meter backstroke, neutral athlete Kliment Kolesnikov triumphed in 23.68 seconds. The Neutral Athletes B (NAB) squad also won the men's 4×100-meter medley relay in a World Championships record time of 3:26.93.