Venus, left, and Serena Williams, right, take the court for their 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)

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

Serena Williams, of the United States, reacts to a winning point during a women's doubles match against Marta Kostyuk, of Ukraine, and Peyton Stearns, of the United States, at the Cincinnati Open tennis tournament, Monday, Aug. 17, 2026, in Mason, Ohio. (AP Photo/Kareem Elgazzar)

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