Swimmers enter the water during the first heat in the men's 4x100-meter at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Australia's Brendon Smith swims to win the bronze medal in the 400-meter individual medley at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/David J. Phillip)

Brendon Smith, of Australia, swims in the final of the men's 400-meter individual medley at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Swimmers warm up before competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo. (AP Photo/David J. Phillip)

Swimmers race in their heat of the men's 200-meter freestyle at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Brendon Smith, of Australia, poses with his bronze medal on the podium after the men's 400-meter individual medley at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)