Daria Kasatkina of Russia returns the ball to Roberta Vinci of Italy during their first round of women's singles match at the 2017 Rogers Cup in Toronto, Canada, August 7, 2017. Daria Kasatkina won 2-0. (Xinhua/Zou Zheng)
Daria Kasatkina of Russia returns the ball to Roberta Vinci of Italy during their first round of women's singles match at the 2017 Rogers Cup in Toronto, Canada, August 7, 2017. Daria Kasatkina won 2-0. (Xinhua/Zou Zheng)