Katie Ledecky, of the United States, reacts after winning the women's 1500-meters freestyle final at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Simone Biles, of the United States, watches gymnasts perform at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo. Biles says she wasn't in right 'headspace' to compete and withdrew from gymnastics team final to protect herself. (AP Photo/Ashley Landis)

Katie Ledecky of the United States swims in the women's 1500-meters freestyle final at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Novak Djokovic, of Serbia, returns to Alejandro Davidovich Fokina, of Spain, during the third round of the men's tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Britain celebrates after winning the mens' 4x200-meter freestyle relay at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Simone Biles, of the United States, waits to perform on the vault during the artistic gymnastics women's final at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo. The American gymnastics superstar has withdrawn the all-around competition to focus on her mental well-being. (AP Photo/Gregory Bull)

Japan's Tetsuto Yamada, bottom, is tagged out by Dominican Republic catcher Charlie Valerio while trying to score on a double hit by Masataka Yoshida in the eighth inning of a baseball game at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Fukushima, Japan. (AP Photo/Jae C. Hong)

United States' Damian Lillard (6) shoots over Iran's Mohammadsina Vahedi (3) during a men's basketball preliminary round game at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Saitama, Japan. (Charlie Neibergall/Pool Photo via AP)

Hungary's Gabriella Szucs (5) and Natasa Rybanska (11) celebrate after a win over the United States in a preliminary round women's water polo match at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Mark Humphrey)

Daiki Hashimoto, of Japan, celebrates after winning the gold medal in the artistic gymnastics men's all-around final at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo. (AP Photo/Gregory Bull)

United States' Stefanie Dolson (13), Jacquelyn Young (8), Kelsey Plum (5) and Allisha Gray celebrate after defeating Russian Olympic Committee in a women's 3-on-3 gold medal basketball game at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Jeff Roberson)