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Switzerland's Roger Federer celebrates after winning the men's singles quarterfinal match against Japan's Kei Nishikori at the Shanghai Masters tennis tournament on Oct. 12, 2018. Roger Federer won 2-0. (Xinhua/Ding Ting)
Switzerland's Roger Federer celebrates after winning the men's singles quarterfinal match against Japan's Kei Nishikori at the Shanghai Masters tennis tournament on Oct. 12, 2018. Roger Federer won 2-0. (Xinhua/Ding Ting)