Spain's Rafael Nadal returns a shot during the men's singles semifinal against Bulgaria's Grigor Dimitrov at the Australian Open tennis championships in Melbourne, Australia, Jan. 27, 2017. (Xinhua/Lui Siu Wai)
Spain's Rafael Nadal returns a shot during the men's singles semifinal against Bulgaria's Grigor Dimitrov at the Australian Open tennis championships in Melbourne, Australia, Jan. 27, 2017. (Xinhua/Lui Siu Wai)
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