1/9
Peyton Stearns, left, of the United States, left, and Marta Kostyuk, right, of Ukraine, wave to the crowd at the end of a women's doubles match against Serena Williams and Venus Williams, also of the United States, at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
2/9
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 in Mason, Ohio. | Photo: AP/Kareem Elgazzar
3/9
Marta Kostyuk, left, of Ukraine, and Peyton Stearns, right, of the United States, laugh during a women's doubles match against Serena Williams and Venus Williams, also of the United States at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
4/9
Serena Williams, of the United States, serves during a women's doubles match with her sister Venus Williams against Marta Kostyuk, of Ukraine, and Peyton Stearns, also of the United States, at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
5/9
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 in Mason, Ohio. | Photo: AP/Kareem Elgazzar
6/9
Fans watch a women's doubles match between Serena Williams and Venus Williams, both of the United States, and Marta Kostyuk, of Ukraine, and Peyton Stearns, also of the United States, at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
7/9
As Peyton Stearns, top right, of the United States, looks on, Marta Kostyuk, top center, of Ukraine, serves against Serena Williams, bottom left, and Venus Williams, bottom right, also of the United States, during a women's doubles match at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
8/9
Marta Kostyuk, left, of Ukraine, shows Peyton Stearns, right, of the United States, how her racket was caught in her dress during a women's doubles match against Serena Williams and Venus Williams, also of the United States, at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
9/9
Marta Kostyuk, of Ukraine, returns a shot during a women's doubles match against Serena and Venus Williams, of the United States, at the Cincinnati Open tennis tournament in Mason, Ohio. | Photo: AP/Kareem Elgazzar
