Seven-time champion Novak Djokovic was made to work hard after a strong start as he began his bid for a 25th Grand Slam title by beating unseeded Frenchman Alexandre Muller 6-1 6-7(7) 6-2 6-2.

From 1-1, he reeled off six games in a row as Muller sprayed errors around the court. With Djokovic leading 6-1 1-0, the OnlyFans-sponsored Frenchman saved a break point with a forehand winner to get himself on the board again.

On a day that saw Alexander Zverev become the fourth top-10 seeded player to be eliminated from the men's draw, Novak Djokovic kept his cool to earn a 6-1 6-7 (7-9) 6-2 6-2 win