Rafael Nadal of Spain hits the ball during the men's singles first round match against Florian Mayer of Germany at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 17, 2017. Nadal won 3-0. (Xinhua/Lui Siu Wai)
Rafael Nadal of Spain hits the ball during the men's singles first round match against Florian Mayer of Germany at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 17, 2017. Nadal won 3-0. (Xinhua/Lui Siu Wai)