
Roberto Bautista Agut of Spain returns the ball during the men's singles quarterfinal match against Alexander Zverev of Germany in the Gerry Weber Open 2017 in Halle, Germany, on June 23, 2017. Zverev won 2-1. (Xinhua/Joachim Bywaletz)

Roberto Bautista Agut of Spain returns the ball during the men's singles quarterfinal match against Alexander Zverev of Germany in the Gerry Weber Open 2017 in Halle, Germany, on June 23, 2017. Zverev won 2-1. (Xinhua/Joachim Bywaletz)