Frances Tiafoe of the United States serves 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
