
Barbora Krejcikova of the Czech Republic hits a return during the first round of women's singles match against Zhang Shuai of China at the 2018 Rogers Cup in Montreal, Canada, Aug. 7, 2018. Zhang Shuai won 2-0. (Xinhua/Andrew Soong)

Barbora Krejcikova of the Czech Republic hits a return during the first round of women's singles match against Zhang Shuai of China at the 2018 Rogers Cup in Montreal, Canada, Aug. 7, 2018. Zhang Shuai won 2-0. (Xinhua/Andrew Soong)