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Roger Federer of Switzerland serves during the men's singles quarterfinal match against Tomas Berdych of the Czech Republic at Australian Open 2018 in Melbourne, Australia, Jan. 24, 2018. Federer won 3-0. (Xinhua/Bai Xuefei)
Roger Federer of Switzerland serves during the men's singles quarterfinal match against Tomas Berdych of the Czech Republic at Australian Open 2018 in Melbourne, Australia, Jan. 24, 2018. Federer won 3-0. (Xinhua/Bai Xuefei)