Novak Djokovic of Serbia shows his dejection during his three set defeat against Luca Nardi of Italy in their third round match during the BNP Paribas Open at Indian Wells Tennis Garden on March 11, 2024 in Indian Wells, California. (PHOTO / AFP)

INDIAN WELLS, California - World number one Novak Djokovic was stunned 6-4 3-6 6-3 by lucky loser Luca Nardi in the third round of Indian Wells on Monday, a victory which the 20-year-old Italian described as a "miracle".

Nardi, who grew up idolizing Djokovic and is ranked 123rd in the world, played the match of his life to defeat the Serbian, dropping his racket and putting his hands over his face after firing an ace out wide to seal the win.

The defeat ends Djokovic's bid for a record sixth title at the tournament in the California desert.

Luca Nardi, of Italy, returns a shot Novak Djokovic, of Serbia, at the BNP Paribas Open tennis tournament on March 11, 2024, in Indian Wells, California. (PHOTO / AP)

"This is a miracle," said Nardi, who lost to David Goffin in qualifiers on Tuesday and only got into the main draw after Tomas Etcheverry withdrew due to injury.

"I'm a 20-year-old guy, 100 in the world and I beat Novak. Crazy. Just crazy."

Nardi came out flying under the lights on center court, drawing Djokovic to the net with a short ball and then rifling a forehand past him for an early break and a 3-2 lead.

Djokovic was well short of his best and a service return from the 24-times Grand Slam champion found the net to hand Nardi the first set.

Novak Djokovic of Serbia plays a backhand against Luca Nardi of Italy in their third round match during the BNP Paribas Open at Indian Wells Tennis Garden on March 11, 2024 in Indian Wells, California. (PHOTO / AFP)

The top seed broke Nardi twice in the second set and held at love to level the contest but his opponent, who had a poster of Djokovic on his wall growing up, refused to back down.

Nardi hit a backhand that Djokovic could not put back in play for a crucial break and a 4-2 advantage in the decider before pulling off the upset.

Nardi will next face American Tommy Paul.

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Gael Monfils, of France, serves to Cameron Norrie, of Great Britain, at the BNP Paribas Open tennis tournament on March 11, 2024, in Indian Wells, California. (PHOTO / AP)

Earlier, Gael Monfils produced a stunning display of shot-making and showmanship to rally from a set and 3-0 down to beat former champion Cameron Norrie 6-7(5) 7-6(5) 6-3 to reach the last 16.

The 37-year-old Frenchman electrified the crowd with his creativity to set up fourth round meeting with ninth seed Casper Ruud.

Norrie, who won the tournament in 2021, piled up 60 unforced errors and could not solve the unpredictable Monfils puzzle in the three hour and 15 minute affair.

"I feel better and better, to be honest," said Monfils, who was sidelined with a wrist injury for part of last season.

Cameron Norrie of Great Britain plays a backhand against Gael Monfils of France in their third round match during the BNP Paribas Open at Indian Wells Tennis Garden on March 11, 2024 in Indian Wells, California. (PHOTO / AFP)

"I've been playing weeks after weeks, which has been a long time I am able to do that. I feel good. So far the body is holding, so I'm happy with that."

American Taylor Fritz, the tournament's 2022 champion, breezed past Sebastian Baez 6-2 6-2 and Grigor Dimitrov's career renaissance got another big lift with a 6-3 6-3 win over France's Adrian Mannarino.

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Seventh seed Holger Rune beat Lorenzo Musetti 6-2 7-6(5) and 17th-seeded American Paul sailed past Ugo Humbert 6-4 6-4 in other third-round action.