Arsenal clinched their first victory over Chelsea at Stamford Bridge in 10 years courtesy of Jorginho’s howler, which set up Emile Smith Rowe’s winner in a 1-0 triumph.
Chelsea dominated proceedings throughout, having more shots and more shots on target.
However, Arsenal got the goal against the run of play in the first half and their hosts continued to misfire.
As well as earning their first win at the home of their London rivals in a decade, Arsenal completed a Premier League double over the Blues for the first time since their 2003/04 title-winning season.
In the context of this season, meanwhile, Arsenal kept their slim hopes of Europa League qualification alive, while Chelsea face two crucial final games of the season to ensure their top-four status.
Chelsea had the best of the early chances, with Mason Mount forcing a save from Bernd Leno and Kai Havertz blazing over one-on-one with the German.
The Blues dominated the rest of the half, but it was Arsenal who got the all-important advantage.
Amid a high Gunners press, Jorginho’s back-pass was goal-bound but for Kepa Arrizbalaga’s save. Nevertheless, he parried it to Pierre-Emerick Aubameyang, who teed up Smith Rowe to finish.
Thereafter, Chelsea‘s dominance resumed, with Mount heavily involved.
The England international had a fierce shot blocked after meeting an accurate Christian Pulisic pull-back, before his low effort forced another parrying save from Leno.
Mohamed Elneny then beat Mount to the ball after Ben Chilwell’s driven cross was palmed into the middle of the box.
But despite Chelsea’s constant advances, Mikel Arteta‘s men had the lead going into half time.
Chelsea equalise but offside strikes
Callum Hudson-Odoi came on at the break to replace Billy Gilmour, but his first big contribution was to blaze over, much like Havertz before him.
The Blues did have the ball in the net through Pulisic’s header from a corner, but he flicked it in from an offside position after Havertz’s assist.
That gave the Gunners a jolt and they went on the hunt for a second goal, Hector Bellerin having a shot saved by Kepa.
Chelsea eventually came back and Arsenal got deeper, with six minutes of added time being allocated. Leno flicked Kurt Zouma’s effort onto the bar, before Olivier Giroud hit the frame immediately after.
As such, Arsenal held on for a famous win at the home of their London rivals.