
Roger Federer of Swizerland serves during the men's singles third round match against Mischa Zverev of Germany at the Championship Wimbledon 2017 in London, Britain, on July 8, 2017. Roger Federer won 3-0. (Xinhua/Jin Yu)

Roger Federer of Swizerland serves during the men's singles third round match against Mischa Zverev of Germany at the Championship Wimbledon 2017 in London, Britain, on July 8, 2017. Roger Federer won 3-0. (Xinhua/Jin Yu)