Djokovic won his 17th Grand Slam singles title in Australia and was an overwhelming favourite to make it 18 in New York having not lost a match all season
Novak Djokovic has been disqualified from the US Open after hitting a line judge with the ball.
The top seed had just dropped his serve to trail opponent Pablo Carreno Busta 6-5 in the opening set of their fourth-round match on Arthur Ashe Stadium. He hit a ball behind him in frustration and it struck a female line judge. After the ball was struck, it was immediately clear that the woman was hurt and the Serbian rushed over to check on her condition. A lengthy discussion followed at the net between tournament officials and Djokovic, before he was sent from the court. Djokovic had not lost this season, enjoying a 26-match winning run, and had secured his 17th Grand Slam singles title at the Australian Open.
Djokovic is not the first player to have been defaulted for something similar, but for it to happen at a Grand Slam and as the tournament favourite is an extraordinary situation.
Canadian Denis Shapovalov was defaulted during a Davis Cup tie against Great Britain in 2017 after smashing a ball in anger which hit umpire Arnaud Gabas in the eye.
Tim Henman, meanwhile, was disqualified from Wimbledon 25 years ago for hitting a ball girl with a ball during a doubles match.