
Caroline Wozniacki of Denmark returns the ball to Karolina Pliskova of the Czech Republic during their quarterfinal match of women's singles at the 2017 Rogers Cup in Toronto, Canada, Aug. 11, 2017. Caroline Wozniacki won 2-1. (Xinhua/Zou Zheng)

Caroline Wozniacki of Denmark returns the ball to Karolina Pliskova of the Czech Republic during their quarterfinal match of women's singles at the 2017 Rogers Cup in Toronto, Canada, Aug. 11, 2017. Caroline Wozniacki won 2-1. (Xinhua/Zou Zheng)