Christian Benteke's first goal in almost a year helped Crystal Palace sink Arsenal 3-2 and put a huge dent in the Gunners' Premier League top-four hopes.
Benteke fired his first goal in 20 games then laid on another for the tricky Wilfried Zaha as the Eagles stunned the Emirates Stadium to claim their eighth league win on the road this term.
James McArthur's header sealed a fine victory that ended Arsenal's 10-match winning league run at home - and threw a spanner in the works in the Gunners' bid for a top-four finish.
Mesut Ozil and Pierre-Emerick Aubameyang struck for Arsenal, but those goals seemed little other than afterthoughts for Unai Emery's rudderless hosts.
Arsenal 2-3 Crystal Palace: 5 talking points as Gunners' top 4 hopes take hit
Arsenal remain fourth in the table but are only ahead of fifth-placed Chelsea on goal difference, with Manchester United two points behind in sixth.
Here are how the Arsenal and Palace players rated...
Arsenal
Bernd Leno 6
Some desperate first-half saves prevented this from being even worse.
Carl Jenkinson 3
Awful first half. No surprise to see him hooked at half time.
Shkodran Mustafi 4
So often the weak link for Arsenal this season. Another poor showing.
Konstantinos Mavropanos 3
The less said about his first-half display the better.
Laurent Koscielny 5
Can’t do it on his own. Too few team-mates willing to take responsibility.
Sead Kolasinac 5
Forced a fine save from Guaita but little else.
Mohamed Elneny 4
How did he stay on the pitch ahead of fit Torreira for so long?
Mesut Ozil 7
Fine goal but went missing as the going got tough. Booked.
Matteo Guendouzi 6
Involved in a running verbal battle with Zaha. Did he lose his concentration?
Alexandre Lacazette 8
Delicious reverse pass for the Ozil goal - and good movement for Arsenal’s second.
Pierre Emerick Aubameyang 8
Blasted his side back into it to at least take it to the wire.
SUBS:
Iwobi for Mavropanos (45) 6
Maitland-Niles for Carl Jenkinson (45) 6
Torreira for Elneny (69) 5
Crystal PALACE
Vincente Guaita 6
Bamboozled by Ozil for the finish but should he have been? At his near post?
Joel Ward 6
Important first-half defensive header to prevent. counter. But AWOL for Ozil’s goal.
Scott Dann 7
Good header for Kelly’s 13th minute chance. Pity Kelly couldn’t take it.
Martin Kelly 6
Lost his composure for that 13th-minute sitter when it seemed easier to score.
Aaron Wan Bissaka 6
A tough afternoon dealing with Arsenal’s wide attacks.
Luka Milivojevic 7
Brilliant delivery for the third goal. So good from dead balls.
Cheikhou Kouyate 7
Forced Leno into two key, desperate saves at the end of the first half.
Max Meyer 7
Lots of industry to help undo the Arsenal defence.
James McArthur 7
Right place, right time to grab the third Palace goal.
Christian Benteke 8
His first goal in a year, swiftly followed by the flick on by the second. He’s back.
Wilfried Zaha 9
He wants out and the queue for him will be a long one on this evidence.
SUBS:
Townsend for Meyer (80)
