Lydia Jacoby, of the United States, reacts after winning the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Lydia Jacoby of the United States waves after winning the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Ariarne Titmus of Australia leaves the pool following her women's 200-meter freestyle semifinal at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Lydia Jacoby, of the United States, poses with the gold medal after winning the final of the women's 100-meter breaststrokeat the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Lydia Jacoby of the United States, sees the results after winning the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Kaylee McKeown of Australia waves after winning the final of the women's 100-meter backstroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

United State's Katy Ledecky, top, swims in a 200-meter freestyle semifinal at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo. (AP Photo/David J. Phillip)

Gold medalist Lydia Jacoby, centre, of the United States, stands with silver medalist Tatjana Schoenmaker, left, of South Africa, and bronze medalist Lilly King, of the United States, after the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Gold medalist Lydia Jacoby of the United States celebrates on the podium after the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan.(AP Photo/Matthias Schrader)

Evgeny Rylov of the Russian Olympic Committee celebrates after winning the final of the men's 100-meter backstroke final at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

United State's Katy Ledecky, top, swims in a 200-meter freestyle semifinal at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo. (AP Photo/David J. Phillip)

Gold medalist Lydia Jacoby, centre, of the United States, stands with silver medalist Tatjana Schoenmaker, left, of South Africa, and bronze medalist Lilly King, of the United States, after the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Kaylee McKeown, left, of Australia is congratulated by compatriot Emily Seebohm, right, and Canada's Kylie Masse after winning the final of the women's 100-meter backstroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Tom Dean of Britain celebrates after winning the final of the men's 200-meter freestyle at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Katie Ledecky of United States leaves the pool after her swim in a women's 200-meter freestyle semifinal at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Gold medalist Lydia Jacoby of the United States, left, is embraced by silver medalist Tatjana Schoenmaker of South Africa after winning the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Ryan Murphy of the United States swims during a semifinal in the men's 100-meter backstroke at the 2020 Summer Olympics, Monday, July 26, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Lydia Jacoby of the United States swims in the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Tom Dean of Britain celebrates after winning the final of the men's 200-meter freestyle at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Lydia Jacoby of the United States waves after winning the final of the women's 100-meter breaststroke at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)