
Mischa Zverev of Germany returns the ball during the men's semifinal against Kei Nishikori of Japan at the Geneva Open ATP 250 Tennis tournament, in Geneva, Switzerland, May 26, 2017. Mischa Zverev won 2-1. (Xinhua/Alain Grosclaude)

Mischa Zverev of Germany returns the ball during the men's semifinal against Kei Nishikori of Japan at the Geneva Open ATP 250 Tennis tournament, in Geneva, Switzerland, May 26, 2017. Mischa Zverev won 2-1. (Xinhua/Alain Grosclaude)