Canada's Milos Raonic serves 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/Lui Siu Wai)
Canada's Milos Raonic serves 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/Lui Siu Wai)