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Daniil Medvedev of Russia returns the ball during the men's singles third round match between Daniil Medvedev of Russia and Cristian Garin of Chile at the 2019 Rogers Cup in Montreal, Canada, Aug. 8, 2019. (Xinhua/Andrew Soong)

Daniil Medvedev of Russia returns the ball during the men's singles third round match between Daniil Medvedev of Russia and Cristian Garin of Chile at the 2019 Rogers Cup in Montreal, Canada, Aug. 8, 2019. (Xinhua/Andrew Soong)