Caeleb Dressel, of United States, celebrates winning a men's 100-meter butterfly semifinal at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Britain's men's 4x200-meters freestyle relay team of Tom Dean, James Guy, Matthew Richards, and Duncan Scott celebrate after winning the gold medal at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Britain's men's 4x200-meters relay team from left, Tom Dean, James Guy, Matthew Richards, and Duncan Scott pose with their gold medals at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Zach Apple, of the United States, starts in a men's 100-meter freestyle semifinal at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Caeleb Dressel, of United States, swims in a men's 100-meter butterfly semifinal at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Britain's men's 4x200-meters relay team of Tom Dean, James Guy, Matthew Richards, and Duncan Scott celebrate after winning at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Zach Apple of the United States starts in his heat of the men's 100-meter freestyle at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Caeleb Dressel of the United States swims in a semifinal heat of the men's 100-meter butterfly at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Zach Apple of the United States rests after his heat of the men's 100-meter freestyle at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Caeleb Dressel, of United States, after winning a men's 100-meter butterfly semifinal at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/David Goldman)