Christine Mboma, of Namibia, left, leads Gabrielle Thomas, of United States in a women's 200-meter first round heat at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Beatrice Masilingi, of Namibia, compete in a semifinal of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Gabrielle Thomas, right, of the United States, leads Christine Mboma, of Namibia, in their heat of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Gabrielle Thomas, right, of the United States, leads Christine Mboma, of Namibia, in their heat of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Christine Mboma, of Namibia, crosses the finish line in her heat of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Christine Mboma, of Namibia, reacts after her heat of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Beatrice Masilingi, of Namibia, reacts after a semifinal of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Beatrice Masilingi, of Namibia, competes in a semifinal of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Christine Mboma, of Namibia, competes in a semifinal of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Christine Mboma, of Namibia, reacts after a semifinal of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Gabrielle Thomas, right, of United States, and Christine Mboma, of Namibia, cross the finish line in their heat of the women's 200-meters at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo. (AP Photo/Petr David Josek)

Lorene Bazolo, of Portugal, Jenna Prandini, of United States, Shelly-Ann Fraser-Pryce, of Jamaica, Anthonique Strachan, of Bahamas and Beatrice Masilingi, of Namibia compete in a women's 200-meter semifinal at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)