Alexis Sanchez’s hat trick saw Arsenal close the gap at the top of the Premier League after they came from behind at Leicester.
The Chilean struck a classy treble as the Gunners moved to within three points of leaders Manchester United thanks to their 5-2 victory.
They also ended the Foxes’ unbeaten start to the season after Theo Walcott had cancelled out Jamie Vardy’s opener.
Vardy — who struck the woodwork twice during a breakneck opening — also bagged a late consolation before Olivier Giroud grabbed Arsenal’s fifth.
The Gunners almost took the lead after six minutes when Walcott was slipped through.
The pass forced him wide but he still crossed for Santi Cazorla, whose shot was hacked off the line by Ritchie De Laet.
It spurred the Foxes into action and they were denied twice in quick succession four minutes later — Petr Cech turned Jeff Schlupp’s drive away before the ball eventually came to Vardy, who hit the base of the post.
But the England striker ruthlessly took his second chance on 13 minutes.
Arsenal’s muted calls for a penalty after Aaron Ramsey went down in the box were ignored and the ball fell to Danny Drinkwater.
He spotted Vardy sprinting clear on the left and launched the ball to the 28-year-old, who cut inside and curled a clinical finish past Cech.
Vardy epitomised Leicester’s fearlessness, and came close to a second four minutes later when his miscued header came back off the bar.
But the hosts were then hit by a sucker punch as Arsenal immediately broke and levelled on 18 minutes.
Predictably the visitors slowed the game down but emerged from the break sharper, and Sanchez made it 3-1 after 57 minutes.
The Foxes had not recovered from the Chilean’s first goal and he again underlined his quality when he ended a neat move, nodding in Mesut Ozil’s hanging ball from six yards.
De Laet’s late block denied Ozil as the hosts began to wilt, and the game was over with nine minutes left.
The Foxes were asleep when Sanchez collected the ball from a throw-in, advanced and sent a low effort past Schmeichel from 25 yards.
Leicester’s response, unsurprisingly, came through Vardy and he grabbed his sixth of the season when he curled in after Cech had denied Andrej Kramaric with two minutes left.
But Arsenal had the last word when Giroud converted Nacho Monreal’s cross from 10 yards in injury time.
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