Emma Mckeon, Meg Harris, Shayna Jack and Mollie O'Callaghan of Australia, celebrate after winning the women's 4x100-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Ashley Landis)
Lukas Maertens, of Germany, stands on the podium after winning the men's 400-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Petr David Josek)
Caeleb Dressel, of the United States, left, and Kyle Chalmers, of Australia, shake hands after a heat in the men's 4x100-meter freestyle relay at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Martin Meissner)
Gold medalist Ariarne Titmus, of Australia, middle, poses for a selfie with silver medalist Summer McIntosh, of Canada, left, and bronze medalist Katie Ledecky, of the United States, on the podium after winning the women's 400-meters freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France.(AP Photo/Matthias Schrader)
Ariarne Titmus, of Australia, celebrates after winning the women's 400-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Matthias Schrader)
Ariarne Titmus, of Australia, celebrates after winning the women's 400-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Petr David Josek)
The United States men's 4x100-meter freestyle relay team celebrate as they stand on the podium after winning the gold medal at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Petr David Josek)
Lukas Maertens, center, of Germany, competes in the men's 400-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. Maertens won gold. (AP Photo/David J. Phillip)
Ariarne Titmus, of Australia, left, hugs Katie Ledecky, of the United States, after winning the women's 400-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/David J. Phillip)
Ariarne Titmus, of Australia, left, celebrates after winning the women's 400-meter freestyle final as Katie Ledecky, of the United States, reacts at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Petr David Josek)
From left to right: Emma Mckeon, Meg Harris, Shayna Jack and Mollie O'Callaghan of Australia, celebrate after winning the women's 4x100-meter freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Ashley Landis)
Gold medalist Ariarne Titmus, of Australia, celebrates after winning the women's 400-meters freestyle final at the 2024 Summer Olympics, Saturday, July 27, 2024, in Nanterre, France. (AP Photo/Petr David Josek)