Ashleigh Barty of Australia serves against Sofia Kenin of the United States during the second round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 6, 2019. Ashleigh Barty of Australia lost 1-2. (Xinhua/Zou Zheng)

Ashleigh Barty of Australia returns the ball against Sofia Kenin of the United States during the second round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 6, 2019. Ashleigh Barty of Australia lost 1-2. (Xinhua/Zou Zheng)

Ashleigh Barty of Australia returns the ball against Sofia Kenin of the United States during the second round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 6, 2019. Ashleigh Barty of Australia lost 1-2. (Xinhua/Zou Zheng)

Sofia Kenin of the United States returns the ball against Ashleigh Barty of Australia during the second round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 6, 2019. Ashleigh Barty of Australia lost 1-2. (Xinhua/Zou Zheng)

Sofia Kenin of the United States returns the ball against Ashleigh Barty of Australia during the second round of women's singles match at the 2019 Rogers Cup in Toronto, Canada, Aug. 6, 2019. Ashleigh Barty of Australia lost 1-2. (Xinhua/Zou Zheng)