Novak Djokovic credited a wave of support from the French Open crowd for helping him avoid an upset at the hands of Lorenzo Musetti in a third-round thriller that ended in the early hours of Sunday morning.

The world No.1 is renowned for his will power and stamina but conceded his title defence had been on shaky ground when his Italian opponent took a two sets to one lead during the four-and-a-half hour match.

“I was in real trouble on the court and he was playing some really amazing tennis. I didn’t know really what to do,” the 37-year-old said after his 7-5, 6-7 (6), 2-6, 6-3, 6-0 win.

“From both hands, he was getting a lot of balls back, winners from both corners. Good serves running every ball down the court. It didn’t feel great playing him that third set and the beginning of the fourth.

“The (crowd) started chanting my name and I just felt a great new wave of willpower and energy. I really needed that push, I really needed that energy.

“I think I was a different player from that moment onwards. And I think from that moment, I probably lost only one game in the rest of the match. I was on a high, riding that wave.”

Defeat would have ended the Serbian’s quest for a record-extending 25th grand slam trophy and resulted in him losing the No.1 ranking to Musetti’s compatriot Jannik Sinner later this month.

Djokovic might have had grounds for complaint after organisers had wedged another contest into the evening schedule, pushing the completion of his match to 3:06 am, the latest ever finish at the French Open. The three-time French Open champion preferred to focus instead on the quality of the five-set contest.

“I don’t want to get into it. I have my opinions but I think there are great things to talk about in this match today,” he said.

“Both Lorenzo and my performances stand out so I don’t want to talk about the schedule. I think some things could have been handled differently but there’s also a beauty in winning a match (so late).”