
Konstantin Kravchuk of Russia serves during the men's singles 2nd round match against Marin Cilic of Croatia at the French Open Tennis Tournament 2017 in Paris, France, on June 1, 2017. (Xinhua/Chen Yichen)

Konstantin Kravchuk of Russia serves during the men's singles 2nd round match against Marin Cilic of Croatia at the French Open Tennis Tournament 2017 in Paris, France, on June 1, 2017. (Xinhua/Chen Yichen)