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