Kiki Bertens of Netherlands returns the ball against Bianca Andreescu of Canada during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)

Bianca Andreescu of Canada returns the ball against Kiki Bertens of Netherlands during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)

Kiki Bertens of Netherlands returns the ball against Bianca Andreescu of Canada during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)

Bianca Andreescu of Canada returns the ball against Kiki Bertens of Netherlands during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)

Kiki Bertens of Netherlands reacts during the third round of women's singles match against Bianca Andreescu of Canada at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)

Kiki Bertens of Netherlands serves against Bianca Andreescu of Canada during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)

Bianca Andreescu of Canada returns the ball against Kiki Bertens of Netherlands during the third round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 8, 2019. Bianca Andreescu of Canada won 2-1. (Xinhua/Zou Zheng)