McIntosh is aiming to win five gold medals in individual events at the worlds in Singapore, and the first one came Sunday in the 400-meter freestyle on the first of eight days in the pool. Only legendary American Michael Phelps has ever won five individual medals in the worlds. He also did it at the Olympics.

In one of the most highly anticipated races of the season, Summer McIntosh beat Katie Ledecky to claim the 400 free gold in Singapore. On the opening night of the 2025 World Aquatics Championships, McIntosh,