Evgeny Rylov, of the Russian Olympic Committee, swims to victory in the men's 200m backstroke final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jeff Roberson)

Emma McKeon, of Australia, swims in a women's 100-meter freestyle semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Tatjana Schoenmaker, of South Africa, celebrates after winning the gold medal in the women's 200-meter breaststroke final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/David Goldman)

Caeleb Dressel, of the United States, after swimming to victory in a men's 100m butterfly semifinal at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jeff Roberson)

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)

Tatjana Schoenmaker of South Africa swims in a women's 200-meter breaststroke semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Tatjana Schoenmaker, right, of South Africa, celebrates after her women's 200-meter breaststroke semifinal with Annie Lazor, of the United States, at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Tatjana Schoenmaker, right, of South Africa, celebrates after her women's 200-meter breaststroke semifinal as Annie Lazor, of the United States, watches at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

From left, Annie Lazor, of United States, Tatjana Schoenmaker, of South Africa, and Lilly King, of United States, pose with their medals after the women's 200-meter breaststroke final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jae C. Hong)

Michael Andrew, of United States, comes off the pool after swimming in the men's 200-meter individual medley final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/David Goldman)

Tatjana Schoenmaker of South Africa swims in a women's 200-meter breaststroke semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

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/Jae C. Hong)

Shun Wang, of China, celebrates after winning the gold medal in the men's 200-meter individual medley final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jae C. Hong)

Michael Andrew of the United States swims in a men's 200-meter individual medley semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Shun Wang, of China, swims to win the gold medal in the men's 200-meter individual medley final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jae C. Hong)

Caeleb Dressel, of the United States, swims to victory in a men's 100m butterfly semifinal at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jeff Roberson)

CORRECTS NAME AND RACE - Emma Mckeon, of Australia, celebrates after winning the gold medal in the women's 100-meter freestyle final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Jae C. Hong)

From left, Lilly King, of United States, Tatjana Schoenmaker, of South Africa, and Annie Lazor, of United States, pose at the podium after the women's 200-meter breaststroke final at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Evgeny Rylov, of the Russian Olympic Committee, swims in a men's 200-meter backstroke semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Emma McKeon of Australia starts in a women's 100-meter freestyle semifinal at the 2020 Summer Olympics, Thursday, July 29, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)