The United States team of Allyson Felix, Dalilah Muhammad, Athing Mu, and Sydney Mclaughlin, from left, celebrate winning the gold medal in the final of the women's 4 x 400-meter relay at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Sifan Hassan, of the Netherlands, wins the women's 10,000-meter run final at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo. (AP Photo/David J. Phillip)

Raven Saunders, of the United States, poses with her silver medal on women's shot put at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. During the photo op at her medals ceremony Sunday night, Saunders stepped off the podium, lifted her arms above her head and formed an “X’ with her wrists. Asked what that meant, she explained: ”It’s the intersection of where all people who are oppressed meet.” (AP Photo/Francisco Seco)

Sifan Hassan, of Netherlands, places a bag of ice on her face after winning the women's 10,000-meters final at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo. (AP Photo/Petr David Josek)

Sifan Hassan, of the Netherlands, is helped after winning the women's 10,000-meter run final at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo. (AP Photo/Martin Meissner)

The United States team of Allyson Felix, Athing Mu, Dalilah Muhammad and Sydney Mclaughlin, from left, celebrate winning the gold medal in the final of the women's 4 x 400-meter relay at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Sydney Mclaughlin of the United States after her team won the gold medal in the final of the women's 4 x 400-meter relay at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Sydney McLaughlin, left, of the United States, embraces compatriot Dalilah Muhammad, after their semifinal of the women's 400-meters at the 2020 Summer Olympics, Wednesday, Aug. 4, 2021, in Tokyo. (AP Photo/David J. Phillip)

Allyson Felix, of the United States, runs in the women's 4 x 400-meter relay at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo. (AP Photo/David J. Phillip)

Gold medalist Sifan Hassan, of Netherlands, kisses her medal during the medal ceremony for the women's 10,000-meters at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo. (AP Photo/Martin Meissner)

Allyson Felix, of the United States, runs in the women's 4 x 400-meter relay at the 2020 Summer Olympics, Saturday, Aug. 7, 2021, in Tokyo. (AP Photo/Matthias Schrader)