France's Gael Monfils returns the ball during the fourth round match against Spain's Rafael Nadal at the Australian Open tennis championships in Melbourne, Australia, Monday, Jan. 23, 2017. (Xinhua/Lui Siu Wai)
France's Gael Monfils returns the ball during the fourth round match against Spain's Rafael Nadal at the Australian Open tennis championships in Melbourne, Australia, Monday, Jan. 23, 2017. (Xinhua/Lui Siu Wai)
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