
Joao Sousa of Portugal hits a return during the men's singles second round match against Novak Djokovic of Serbia at French Open Tennis Tournament 2017 in Roland Garros, Paris, France, on May 31, 2017. Djokovic won 3-0. (Xinhua/Han Yan)

Joao Sousa of Portugal hits a return during the men's singles second round match against Novak Djokovic of Serbia at French Open Tennis Tournament 2017 in Roland Garros, Paris, France, on May 31, 2017. Djokovic won 3-0. (Xinhua/Han Yan)