
Roger Federer of Switzerland competes during the men's singles quarterfinals 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 competes during the men's singles quarterfinals 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)