Canada's Summer McIntosh and American Katie Ledecky will square off in the women's 400 and 800-metre freestyle events at the swimming world championships in Singapore. Here's a look at both matchups,

In the first of two anticipated showdowns at world championships, the Canadian phenom McIntosh was dominant against the American Ledecky.

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,