
Kei Nishikori of Japan eyes on the ball during the men's quarterfinal against Andy Murray of Britain at the 2017 French Open Tennis Tournament in Paris, France on June 7, 2017. Andy Murray won 3-1. (Xinhua/Chen Yichen)

Kei Nishikori of Japan eyes on the ball during the men's quarterfinal against Andy Murray of Britain at the 2017 French Open Tennis Tournament in Paris, France on June 7, 2017. Andy Murray won 3-1. (Xinhua/Chen Yichen)