South African swimmer flirts with world mark in Tokyo heats
United States women's 4x200-meter freestyle relay team Paige Madden, left, Arabella Sims and Kathy McLaughlin, right, react during their heat at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

United States women's 4x200-meter freestyle relay team Paige Madden, left, Arabella Sims and Kathy McLaughlin, right, react during their heat at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Jul. 28, 2021 07:40 AM EDT
Tatjana Schoenmaker of South Africa smiles after her heat in the women's 200-meter breaststroke at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Tatjana Schoenmaker of South Africa smiles after her heat in the women's 200-meter breaststroke at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Matthias Schrader)

Jul. 28, 2021 07:33 AM EDT
Lilly King of the United States swims in a heat in the women's 200-meter breaststroke at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Lilly King of the United States swims in a heat in the women's 200-meter breaststroke at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Jul. 28, 2021 07:08 AM EDT
Luke Greenbank, of Britain, swims in a heat of the men's 200-meter backstroke at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Luke Greenbank, of Britain, swims in a heat of the men's 200-meter backstroke at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Jul. 28, 2021 06:33 AM EDT
Emma McKeon, of Australia, swims in a heat of the women's 100-meter freestyle at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Emma McKeon, of Australia, swims in a heat of the women's 100-meter freestyle at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Petr David Josek)

Jul. 28, 2021 06:27 AM EDT
Michael Andrew of the the United States swims in a heat of the men's 200-meter individual medley at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Michael Andrew of the the United States swims in a heat of the men's 200-meter individual medley at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Jul. 28, 2021 08:06 AM EDT