Karsten Warholm, of Norway celebrates as he wins the gold medal ahead of Rai Benjamin, of United States in the final of the men's 400-meter hurdles at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo, Japan. (AP Photo/Charlie Riedel)

Karsten Warholm, of Norway, reacts after winning the men's 400-meter hurdles final at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo. (AP Photo/Petr David Josek)

FILE - In this May 6, 1954, file photo, British athlete Roger Bannister breaks the tape to become the first man ever to break the four minute mile at Iffly Field, Oxford, England. Karsten Warholm's staggering run to shatter his own 400-meter hurdles world record at the Olympics on Tuesday, Aug. 3, 2021, has posed the question: Was it the greatest track race ever? Maybe. (AP Photo, File)

FILE - In this Aug. 1, 1996, file photo, Michael Johnson, of the United States, celebrates after he won the men's 200-meter final in a world record time of 19.32 at the 1996 Summer Olympic Games in Atlanta. Karsten Warholm's staggering run to shatter his own 400-meter hurdles world record at the Olympics on Tuesday, Aug. 3, 2021, has posed the question: Was it the greatest track race ever? Maybe. (AP Photo/Doug Mills, File)

FILE - In this Aug. 16, 2009, file photo, Jamaica's Usain Bolt celebrates setting a new men's 100-meter world record at the World Athletics Championships in Berlin. Karsten Warholm's staggering run to shatter his own 400-meter hurdles world record at the Olympics on Tuesday, Aug. 3, 2021, has posed the question: Was it the greatest track race ever? Maybe. (AP Photo/Michael Sohn, File)

Karsten Warholm, of Norway celebrates as he wins the gold medal in the final of the men's 400-meter hurdles at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

FILE - In this Oct. 4, 2019, file photo, Dalilah Muhammad, of the United States, wins the gold medal in the women's 400-meter hurdles final at the World Athletics Championships in Doha, Qatar. Karsten Warholm's staggering run to shatter his own 400-meter hurdles world record at the Olympics on Tuesday, Aug. 3, 2021, has posed the question: Was it the greatest track race ever? Maybe. (AP Photo/Petr David Josek, File)

Karsten Warholm, of Norway celebrates as he wins the gold medal ahead of Rai Benjamin, of United States in the final of the men's 400-meter hurdles at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

FILE - In this Oct. 14, 1964, file photo, U.S. Marine Lt. Billy Mills breaks the tape to win the 10,000-meters Olympic race in Tokyo, setting an Olympic record of 28:24:4, and was the only American ever to win the event. Karsten Warholm's staggering run to shatter his own 400-meter hurdles world record at the Olympics on Tuesday, Aug. 3, 2021, has posed the question: Was it the greatest track race ever? Maybe. (AP Photo, File)

Karsten Warholm, of Norway celebrates as he wins the gold medal in the final of the men's 400-meter hurdles at the 2020 Summer Olympics, Tuesday, Aug. 3, 2021, in Tokyo, Japan. At right is Alison Dos Santos, of Brazil, who took the bronze. (AP Photo/Martin Meissner)