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

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