Novak Djokovic [Source: Reuters]

Novak Djokovic’s bid for a 25th Grand Slam briefly hung by a thread on a cold and damp Saturday night at Roland Garros but the Serbian battled back for a 7-5 6-7(6) 2-6 6-3 6-0 win over Lorenzo Musetti in the latest ever French Open finish.

The reigning champion showcased the iron will that has made him one of the game’s greatest players to avoid defeat in a thrilling third-round contest that got underway at 10.37 p.m. local time on Saturday.

Some 4-1/2 hours later at 3.06 a.m. on Sunday morning, the fans who had huddled up under rugs as the 37-year-old orchestrated his superb fightback rose to their feet to lift the roof of the main showcourt.

Djokovic recovered from an early loss of serve and went toe to toe with the Italian in the draining first set before edging in front with a crucial break in the 12th game thanks to some incredible defending.

The world number one lowered his head and gasped for air following that lengthy rally, but was soon in cruise control in the second set with a spectacular drop that gave him a 3-1 lead.

Musetti, though, broke back and drew level at 4-4 before saving a set point in a high-quality tie break to level the match.

The 30th seed took his game up a few notches to break and surge ahead in the third set, before sealing it comfortably as alarm bells began to ring for a fading Djokovic.

Djokovic, who ranted about the state of the surface to the umpire, suddenly rediscovered his rhythm to wrap up the fourth before pulling away from his exhausted opponent in the decider.