Jan-Lennard Struff of Germany hits the ball during the men's singles first round match against Dominic Thiem of Austria at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 17, 2017. Struff lost 1-3. (Xinhua/Bai Xue)
Jan-Lennard Struff of Germany hits the ball during the men's singles first round match against Dominic Thiem of Austria at the Australian Open Tennis Championships in Melbourne, Australia, Jan. 17, 2017. Struff lost 1-3. (Xinhua/Bai Xue)