
Roger Federer of Switzerland celebrates during the men's singles quarterfinal match against Mischa Zverev of Germany at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 24, 2017. Federer won 3-0. (Xinhua/Lui Siu Wai)

Roger Federer of Switzerland celebrates during the men's singles quarterfinal match against Mischa Zverev of Germany at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 24, 2017. Federer won 3-0. (Xinhua/Lui Siu Wai)