Liudmila Samsonova of Russia returns the ball the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Learner Tien returns the ball during the men's singles round of 16 match between Learner Tien of the United States and Thiago Agustin Tirante of Argentina at the 2026 National Bank Open tennis tournament in Montreal, Canada, Aug. 9, 2026. (Photo by Li Haitao/Xinhua)

Learner Tien returns the ball during the men's singles round of 16 match between Learner Tien of the United States and Thiago Agustin Tirante of Argentina at the 2026 National Bank Open tennis tournament in Montreal, Canada, Aug. 9, 2026. (Photo by Li Haitao/Xinhua)

Learner Tien celebrates scoring during the men's singles round of 16 match between Learner Tien of the United States and Thiago Agustin Tirante of Argentina at the 2026 National Bank Open tennis tournament in Montreal, Canada, Aug. 9, 2026. (Photo by Li Haitao/Xinhua)

Coco Gauff of the United States returns the ball during the women's singles round of 16 match between Alina Korneeva of Russia and Coco Gauff of the United States at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Coco Gauff of the United States returns the ball during the women's singles round of 16 match between Alina Korneeva of Russia and Coco Gauff of the United States at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Coco Gauff (L) of the United States and Alina Korneeva of Russia shake hands after their women's singles round of 16 match at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Liudmila Samsonova of Russia serves during the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Elena Rybakina of Kazakhstan celebrates scoring during the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Elena Rybakina of Kazakhstan returns the ball during the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Elena Rybakina of Kazakhstan returns the ball during the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Elena Rybakina of Kazakhstan celebrates victory after the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)

Elena Rybakina of Kazakhstan returns the ball during the women's singles round of 16 match between Liudmila Samsonova of Russia and Elena Rybakina of Kazakhstan at the 2026 National Bank Open tennis tournament in Toronto, Canada, on Aug. 9, 2026. (Photo by Zou Zheng/Xinhua)