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.
The 20-year-old Italian, who grew up idolising 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.
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 either 19-year-old compatriot Arthur Fils or 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.
Seventh seed Holger Rune beat Lorenzo Musetti 6-2 7-6(5) and 17th-seeded American Tommy Paul sailed past Ugo Humbert 6-4 6-4 in other third round action.
Australia were dealt an early blow in their quest to reach the Super Eight stage of the Twenty20 World Cup after the depleted former champions crashed to a 23-run defeat by Zimbabwe in Colombo on Friday.
Arsenal has wasted the chance to restore their six-point lead at the top of the Premier League table as they were held to a 1-1 draw at Brentford on Thursday, with Noni Madueke's second-half header cancelled out by Keane Lewis-Potter.
Defending champions India continued their march towards the Super Eight stage of the Twenty20 World Cup with a 93-run win over Namibia in a group A contest at Arun Jaitley Stadium on Thursday.
Brothers Justin and Anthony Mosca guided Twenty20 World Cup debutants Italy to their first win in the tournament, as their unbeaten half-centuries secured a dominant 10-wicket victory over Nepal in a Group C clash on Thursday.