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Serbia's Novak Djokovic pretends to play the violin for his daughter as he celebrates winning against Denmark's Holger Rune at The All England Lawn Tennis and Croquet Club in Wimbledon, southwest London, on July 8. Image Credit: AFP

London: Novak Djokovic progressed to a record-equalling 13th Wimbledon semi-final without hitting a ball on Wednesday after Alex de Minaur pulled out injured.

Australian ninth seed De Minaur, 25, announced shortly after midday at the All England Club that he was "devastated to pull out due to a hip injury".

It means Djokovic has now equalled Roger Federer's men's record of 13 semi-final appearances at Wimbledon as he closes on the Swiss great's mark of eight singles titles.

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Australia's Alex De Minaur reacts after winning against France's Arthur Fils during their men's singles. Image Credit: AFP

The 37-year-old Serbian is through to a record-extending 49th men's Grand Slam semi-final.

De Minaur, who beat Djokovic at the United Cup in January, said: "It's no secret that this would have been the biggest match of my career but it's a unique injury.

"I woke up this morning wanting to feel some sort of miracle, but there was a high risk of making the injury worse if I stepped on court.

"One stretch, one slide could take this from a three to six weeks' injury to four months out."

Djokovic will play US 13th seed Taylor Fritz or Italian 25th seed Lorenzo Musetti for a place in Sunday's showpiece match.

The world number two does not have a title to his name this year and is still seeking a first victory against a fellow top-10 player.

But a historic 25th Grand Slam triumph is coming into sharp focus for Djokovic, who demolished Holger Rune in straight sets in the fourth round.

Such has been his impressive form at the All England Club that it is easy to forget he had knee surgery after suffering an injury at the recent French Open.