Alexander Zverev of Germany returns the ball during the men's singles third round match against Rafael Nadal of Spain at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 21, 2017. Zverev lost 2-3. (Xinhua/Lui Siu Wai)
Alexander Zverev of Germany returns the ball during the men's singles third round match against Rafael Nadal of Spain at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 21, 2017. Zverev lost 2-3. (Xinhua/Lui Siu Wai)
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