It’s Katie Ledecky of the United States against Summer McIntosh of Canada in the final of the 800-meter freestyle, probably the most anticipated race at the swimming world championships in Singapore.

Also Friday, Toronto’s Josh Liendo and Montreal’s Ilya Kharun booked spots in the men’s 100-metre butterfly final Saturday. The two shared the Olympic podium in Paris last year, with Liendo taking silver and Kharun the bronze. Liendo turned in the second-fastest time in the semifinals of 50.24 seconds, while Kharun was fourth in 50.39.