Serena Williams, of the United States, returns the ball during a mixed doubles match at the U.S. Open tennis championships, Tuesday, Aug. 25, 2026, in New York. (AP Photo/Yuki Iwamura)

Carlos Alcaraz, of Spain, left, and Serena Williams, of the United States, react during a mixed doubles match at the U.S. Open tennis championships, Tuesday, Aug. 25, 2026, in New York. (AP Photo/Yuki Iwamura)

Serena Williams, of the United States, hits the ball during a mixed doubles match at the U.S. Open tennis championships, Tuesday, Aug. 25, 2026, in New York. (AP Photo/Sydney Schaefer)

Serena Williams, of the United States, and Carlos Alcaraz, of Spain, react during a mixed doubles match at the U.S. Open tennis championships, Tuesday, Aug. 25, 2026, in New York. (AP Photo/Yuki Iwamura)

Humanoid robots fight for the ball during the large robot soccer final match of the 2nd World Humanoid Robot Games at the National Speed Skating Oval in Beijing on August 26, 2026. (Photo by GREG BAKER / AFP via Getty Images)

Serena Williams, left, and Venus Williams, right, both of the United States, wave to the crowd at the end of a women's doubles match against Marta Kostyuk, of Ukraine, and Peyton Stearns, also of the United States, at the Cincinnati Open tennis tournament, Monday, Aug. 17, 2026, in Mason, Ohio. (AP Photo/Kareem Elgazzar)

Serena Williams, left, and Venus Williams, right, both of the United States, wave to the crowd at the end of a women's doubles match against Marta Kostyuk, of Ukraine, and Peyton Stearns, also of the United States, at the Cincinnati Open tennis tournament, Monday, Aug. 17, 2026, in Mason, Ohio. (AP Photo/Kareem Elgazzar)

Serena Williams, left, first bumps Venus Williams, right, both of the United States, during a women's doubles match against Marta Kostyuk, of Ukraine, and Peyton Stearns, also of the United States, at the Cincinnati Open tennis tournament, Monday, Aug. 17, 2026, in Mason, Ohio. (AP Photo/Kareem Elgazzar)