Australian Kaylee McKeown, who won every backstroke title at the last two Olympics and at the 2023 Worlds, opted not to swim the 50m this year. She owns the world record of 26.86.

The Canadian star challenged the all-time mark in the women's 200-meter butterfly and continued her perfect string of races in Singapore.

Summer McIntosh returns to the spotlight in her pursuit of five individual gold medals at these world championships for the women's 200-metre butterfly final at 7:02 a.m. ET on Thursday.