Simone Manuel, top, of the United States, swims alongside Emma Mckeon, of Australia, during heat 10 of the women's 50-meter freestyle at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jeff Roberson)

Simone Manuel, of United States, swims in a women's 50-meter freestyle heat at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Caeleb Dressel, of United States, celebrates wining a men's 50-meter freestyle heat at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Caeleb Dressel, of United States, starts a men's 50-meter freestyle heat at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Emma Mckeon, of Australia, right, celebrates with teammate Cate Campbell after winning the women's 100-meter freestyle final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jae C. Hong)

Simone Manuel, of United States, finishes a women's 50-meter freestyle heat at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/David Goldman)