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Switzerland's Roger Federer serves during the men's singles third round match against Spain's Roberto Bautista Agut at the Shanghai Masters tennis tournament on Oct. 11, 2018. Roger Federer won 2-1. (Xinhua/Fan Jun)
Switzerland's Roger Federer serves during the men's singles third round match against Spain's Roberto Bautista Agut at the Shanghai Masters tennis tournament on Oct. 11, 2018. Roger Federer won 2-1. (Xinhua/Fan Jun)