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Karolina Pliskova of the Czech Republic reacts during the quarterfinals of women's singles at the 2019 Rogers Cup in Toronto, Canada, Aug. 9, 2019. (Xinhua/Zou Zheng)

Karolina Pliskova of the Czech Republic reacts during the quarterfinals of women's singles at the 2019 Rogers Cup in Toronto, Canada, Aug. 9, 2019. (Xinhua/Zou Zheng)