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) ...

Karsten Warholm, of Norway celebrates winning the gold medal in the Men's 400-meters hurdles final during the World Athletics Championships in Budapest, Hungary, Wednesday, Aug. 23, 2023.

Karsten Warholm, Norway: 46.53 seconds (Sept. 16, 2023 — Prefontaine Classic) Rai Benjamin, United States: 46.62 seconds (July 9, 2023 — 2023 U.S. Track and Field Championships) ...

Karsten Warholm of Norway absolutely pulverized his own world record Tuesday in Tokyo by three-quarters of a second, setting an unfathomable mark of 45.94 — one that may never be surpassed ...

Karsten Warholm, of Norway celebrates winning the gold medal in the Men's 400-meters hurdles final during the World Athletics Championships in Budapest, Hungary, Wednesday, Aug. 23, 2023.

U.S. star Rai Benjamin edged men's 400m hurdles world record holder Karsten Warholm of Norway by just .06 of a second to win at the Monaco Diamond League event in 46.67 seconds, also topping 2022 ...

Karsten Warholm, the Norwegian reigning world champion and gold medalist in the 400-meter hurdles has a budding rivalry with the American Rai Benjamin. It’s just what track and field needs.

Karsten Warholm, of Norway celebrates winning the gold medal in the Men’s 400-meters hurdles final during the World Athletics Championships in Budapest, Hungary, Wednesday, Aug. 23, 2023.

Karsten Warholm, Norway: 46.53 seconds (Sept. 16, 2023 — Prefontaine Classic) Rai Benjamin, United States: 46.62 seconds (July 9, 2023 — 2023 U.S. Track and Field Championships) ...