World number 1, Novak Djokovic has been disqualified from the US Open after hitting a line judge with the ball.
The Serbian had just dropped his serve to trail opponent Pablo Carreno Busta 6-5 in the opening set of their 4th round tie.
In sheer frustration, he hit the ball behind him and it struck a female line judge.
As soon as the ball hit her, it was immediately clear that she was hurt and he quickly rushed over to check on her.
Tournament referee Soeren Friemel came on the court and spoke to the chair umpire Aurelie Tourte and Andreas Egli, the grandslam supervisor, before a lengthy discussion between tournament officials and the player.
He pleaded his case at length before accepting the decision, as he struted off after collecting his rackets.
Djokovic later Apologised in a statement in his Instagram.
