Sifan Hassan, of Netherlands, competes in the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (AP Photo/Petr David Josek)

Faith Kipyegon, of Kenya, celebrates as she crosses the finish line after winning the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (AP Photo/Petr David Josek)

Shaunae Miller-Uibo, of Bahamas crosses the line to win the gold medal ahead of Allyson Felix, of United States, bronze, in the final of women's 400-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Sifan Hassan, of Netherlands after taking the bronze medal in the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Sifan Hassan, of Netherlands, bronze, leads Faith Kipyegon, of Kenya who won the gold during the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Allyson Felix, of United States smiles after taking the bronze, in the final of women's 400-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Joshua Cheptegei, of Uganda celebrates with Paul Chelimo, of United States, bronze, after winning the gold medal in the final of the men's 5,000-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Filippo Tortu, right, and Eseosa Desalu of Italy celebrate after taking the gold medal in the final of the men's 4 x 100-meter relay at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Sifan Hassan, of Netherlands, reacts after the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (AP Photo/Petr David Josek)

Filippo Tortu, of Italy, left, reacts after his team won the men's 4x100-meter relay final at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (AP Photo/David J. Phillip)

Joshua Cheptegei, center, of Uganda poses after winning gold alongside silver medalist Mohammed Ahmed, left, of Canada and bronze medalist Paul Chelimo of the United States after the final of the men's 5,000-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (Dylan Martinez/Pool Photo via AP)

Lamont Jacobs of Italy celebrates after taking the gold medal in the final of the men's 4 x 100-meter relay at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Sifan Hassan, of Netherlands after taking the bronze medal in the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Joshua Cheptegei of Uganda celebrates with his national flag after winning gold in the final of the men's 5,000-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (Dylan Martinez/Pool Photo via AP)

Faith Kipyegon, of Kenya, celebrates as she crosses the finish line after winning the final of the women's 1,500-meters at the 2020 Summer Olympics, Friday, Aug. 6, 2021, in Tokyo. (AP Photo/Petr David Josek)