Frances Tiafoe of the United States returns the ball during the men's singles 4th round match against Grigor Dimitrov of Bulgaria at the Australian Open in Melbourne, Australia, Jan. 20, 2019. (Xinhua/Hu Jingchen)
In pics: men's singles 4th round match at Australian Open
Source: Xinhua| 2019-01-20 18:57:53|Editor: mym
