
Alexandr Dolgopolov of Ukraine reacts during the men's singles second round match with Stan Wawrinka of Switzerland at French Open Tennis Tournament 2017 in Roland Garros, Paris, France on June 1, 2017. Wawrinka won 3-0. (Xinhua/Han Yan)

Alexandr Dolgopolov of Ukraine reacts during the men's singles second round match with Stan Wawrinka of Switzerland at French Open Tennis Tournament 2017 in Roland Garros, Paris, France on June 1, 2017. Wawrinka won 3-0. (Xinhua/Han Yan)