GRIGOR DIMITROV suffered Wimbledon heartbreak when he was on the verge of knocking out world number one Jannik Sinner.

The 34-year-old Bulgarian had won the first two sets 6-3 7-5 and was playing some inspired tennis when, at 2-2 in the third, he clutched his chest after serving an ace.

Sinner rushed around the net to check on his opponent as he sat, in some distress, on the court.

The 19th seed was helped to his feet by two physios and went off to receive treatment, before returning a few minutes later to shake Sinner’s hand.

It was more dreadful luck for a popular player, who had to retire injured from matches in the last four grand slams, including against Daniil Medvedev here at the same stage last year.

Sinner, who helped Dimitrov pack his rackets away and carried his bag off court, said: “I don’t know what to say. He is an incredible player, I think we all saw this today.

“He’s been so unlucky in the past couple of years. An incredible player, a good friend also. Seeing him in this position, if there would be a chance he could play the next round he would deserve it.

“I hope he has a speedy recovery. I don’t take this as a win at all. This is just a very unfortunate moment to witness for all of us.

“In the last grand slams he struggled a lot. Seeing him again having this kind of injury is very, very tough. It’s very sad. We all wish him only the best, let’s have applause for him.”

It was a major reprieve for Sinner, the three-time grand slam winner who looked set to be on the end of a seismic shock in front of a stunned Centre Court.

The Italian had slipped on the baseline in the opening game and took a medical timeout midway through the second set for treatment on his right wrist and elbow.

But the physio was unable to alleviate the real pain for Sinner, which was Dimitrov serving up a grass-court clinic on a surface the 23-year-old has yet to get to grips with.

The veteran was rolling back the years, evoking memories of the same player who ended Andy Murray’s title defence way back in 2014.

Sadly, after two hours and eight minutes of vintage Dimitrov, his body let him down again with what looked like an injury to his right pectoral.

Dimitrov was barely able to raise his right arm to acknowledge the warm applause from the crowd as he tearfully left the court.

It was later announced he would not be fulfilling any media commitments on medical advice.

Sinner admitted his elbow was hindering his serve after that early fall and said: “Tomorrow we will check to see how it is.”

The top seed is due to play the US’s Ben Shelton in the quarter-finals on Wednesday.