Australian Nick Kyrgios briefly threatens to stop playing during his first-round match against Argentine Diego Schwartzman when a line call goes against him.

After consulting with the umpire, the 20-year-old returns to action and goes on to win the match 6-0 6-2 7-6 (8-6).

Kyrgios shouted "dirty scum" during the subsequent changeover, though he said the comment was directed at himself rather than an official.