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

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