Adam Peaty celebrates winning the gold medal in the mixed 4x100-meter medley relay final at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. (AP Photo/Jae C. Hong)

James Guy, of Britain, swims in a mixed 4x100-meter medley relay at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. Britain won the gold medal. (AP Photo/David Goldman)

Caeleb Dressel, of the United States, left, talks with Britain's James Guy after the mixed 4x100-meter medley relay at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. (AP Photo/David Goldman)

Caeleb Dressel, of the United States, swims the final leg of the mixed 4x100-meter medley relay at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. (AP Photo/David Goldman)

Chelsea Hodges, of Australia, swims in a women's 4x100-meter medley relay heat at the 2020 Summer Olympics, Friday, July 30, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)

Caeleb Dressel, of the United States, right, comforts teammate Torri Huske after they finished fifth in the mixed 4x100-meter medley relay at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. (AP Photo/David Goldman)

CORRECTS TO RYAN MURPHY NOT JAMES GUY - Caeleb Dressel, of the United States, left, talks with teammate Ryan Murphy after they finished fifth in the mixed 4x100-meter medley relay at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. (AP Photo/David Goldman)

Britain mixed 4x100-meter medley relay team, from left, Adam Peaty, James Guy Anna Hopkin and Kathleen Dawson, step onto the podium after winning the gold medal at the 2020 Summer Olympics, Saturday, July 31, 2021, in Tokyo, Japan. (AP Photo/Gregory Bull)