Karolina Pliskova of the Czech Republic celebrates victory after the third round of women's singles match against Anett Kontaveit of Estonia at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Karolina Pliskova of the Czech Republic won 2-0. (Xinhua/Zou Zheng)

Karolina Pliskova of the Czech Republic celebrates scoring during the third round of women's singles match against Anett Kontaveit of Estonia at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Karolina Pliskova of the Czech Republic won 2-0. (Xinhua/Zou Zheng)

Anett Kontaveit of Estonia returns the ball against Karolina Pliskova of the Czech Republic during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Karolina Pliskova of the Czech Republic won 2-0. (Xinhua/Zou Zheng)

Karolina Pliskova of the Czech Republic returns the ball against Anett Kontaveit of Estonia during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Karolina Pliskova of the Czech Republic won 2-0. (Xinhua/Zou Zheng)

Anett Kontaveit of Estonia returns the ball against Karolina Pliskova of the Czech Republic during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Karolina Pliskova of the Czech Republic won 2-0. (Xinhua/Zou Zheng)

Karolina Pliskova of the Czech Republic returns the ball against Anett Kontaveit of Estonia during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Karolina Pliskova of the Czech Republic won 2-0. (Xinhua/Zou Zheng)