Spain's Rafael Nadal returns the ball during the men's singles quarterfinal match against Canada's Milos Raonic at the Australian Open tennis championships in Melbourne, Australia, Jan. 25, 2017. (Xinhua/Bai Xue)
Spain's Rafael Nadal returns the ball during the men's singles quarterfinal match against Canada's Milos Raonic at the Australian Open tennis championships in Melbourne, Australia, Jan. 25, 2017. (Xinhua/Bai Xue)