
Sloane Stephens of the United States returns the ball to Lucie Safarova of the Czech Republic during their quarterfinal match of women's singles at the 2017 Rogers Cup in Toronto, Canada, Aug. 11, 2017. Sloane Stephens won 2-1. (Xinhua/Zou Zheng)

Sloane Stephens of the United States returns the ball to Lucie Safarova of the Czech Republic during their quarterfinal match of women's singles at the 2017 Rogers Cup in Toronto, Canada, Aug. 11, 2017. Sloane Stephens won 2-1. (Xinhua/Zou Zheng)