94'
The Gunners have finally shaken off their Chelsea hoodoo and only Fulham are in worse form than the champions, who have now failed to win in six games, with just two victories in their past nine. Fantastic result and fully justified win for Wenger's men, the decision to start Van Persie and Walcott was a tactical masterstroke.
94'
It's all over! A huge victory for the Gunners.
93'
One last break now for Arsenal - Rosicky hits the post! But he was offside anyway.
93'
Just 30 seconds remaining and there is no doubting the outcome of this game now.
92'
Arsenal just patiently spreading the ball around, although Kakuta does well to chase down Diaby.
91'
Wilshere plays in Chamakh but Cech does enough to divert him away from goal by making himself big.
90'
Cole advanced down the left and he is well out of position as Arsenal break now.
90'
Four minutes of added time to play.
89'
Kalou was offside when he turned it in following some pinball in the box.
89'
The ball is in the net but the flag is up.
89'
Djourou fouls Drogba and it's a Chelsea free-kick.
89'
The boos still going string for Cole.
89'
Rosicky takes Arsenal down the right wing but he gives it away.
88'
Comment from ESPNsoccernet's Jon Carter: Koscielny just bullies Drogba in the air. That's been the story of the night. Drogba has not looked the same kind of player who has destroyed the Gunners in the past. Has he recovered from that bout of malaria fully?
87'
The Arsenal fans reserve a standing ovation for their influential captain.
87'
 Rosicky on for Fabregas
87'
Lampard drags a shot wide, the unconvincing attempt summing up his evening nicely.
86'
Arsenal sitting deep now, inviting the Blues to do their worst.
85'
Cesc Fabregas celebrates netting Arsenal's second goal.
84'
The champions desperately searching for some late inspiration, but they look to be heading for their fifth defeat of the season.
83'
Up and over, much to the delight of the Emirates faithful.
83'
But Chelsea now have another free-kick around 30 yards out. Drogba lining it up.
82'
Fabregas goes down under a challenge from Ramires but Clattenburg isn't interested.
82'
Sloppy clearance from Song and Lampard looks to play in Kakuta, who just isn't on his wavelength.
81'
Kakuta fed Ramires but his cross-cum shot ballooned over the bar.
80'
Wilshere slips Diaby in beautifully but rather than swinging a left foot at it he turned onto his right and saw his effort blocked.
79'
Carlo Ancelotti looks perplexed. He may be looking for a new job in the morning...
78'
Terry looks long for Kalou, but the Ivorian is offside.
78'
Koscielny slices an attempted clearance but Sagna tidies up.
77'
Sagna caught in a few minds and Essien comes deep to begin another Chelsea charge. Lampard has been surprisingly ineffective tonight, as he feels his way back into first-team football.
76'
It's been a dogged display from the Dutchman, and he earns a warm handshake from Wenger.
75'
 Chamakh on for Van Persie.
75'
Successive deliveries met by Song and the ball falls to Kakuta, who can't engineer a shot of any note.
74'
Essien attempts to drive Chelsea forward and the Blues win a corner as Bosingwa's cross is diverted out by Song.
73'
Walcott has been excellent, a really dangerous weapon through Arsenal throughout. Diaby has been introduced to try to steady the ship a little.
72'
 Diaby on for Walcott
71'
Arsenal come forward again now, and Fabregas is blocked off by Ivanovic to win a fre-kick on the left wing.
71'
and once again Terry is up to the challenge as he tackles a turning Van Persie.
70'
Van Persie plays it to Fabregas, who finds Wilshere. The youngster tries to dink the ball around John Terry but the Chelsea skipper stands tall.
69'
That booking for Fabregas means that he will miss Arsenal's next game through suspension.
69'
But it is a weak effort and the Chelsea goalkeeper blocks the attempt.
68'
The ball comes across to Nasri, who tries to flick the ball up over Cech...
68'
It's cleared this time though as Arsenal break at pace with Walcott.
67'
The fans were silenced as Essien intercepted and Fabregas brought him down. Drogba in an identical position to where Chelsea scored from before.
67'
 Fabregas.
66'
Patient build up from Arsenal with Sagna, Wilshere and Nasri all involved. Lovely football from the Gunners as the chants of "Ole" echo around the Emirates.
66'
As things stand, the Gunners will go two points behind Manchester United in second place, above Manchester City on goal difference.
65'
Wilshere fouled again, and Arsenal have a free-kick inside the centre circle.
65'
Stats: Chelsea were the first side to win four straight league matches against Arsenal since Liverpool managed it from 1996 to 1998.
64'
Diving header by Song and Bosingwa launches an optimistic effort that ends up harmlessly in the stands.
64'
Chelsea corner again, Drogba to deliver.
63'
The corner was safely booted clear and Bosingwa crossed back in only for it to be collected by Fabianski.
62'
Arsenal's defence was cut apart with worrying ease there.
62'
chelsea corner after Drogba's shot was deflected away.
61'
 Bosingwa on for Ferreira.
61'
Gunners fans must be nervously hoping that there is no repeat of the Spurs game, when their rivals came back to win 3-2 having been 2-0 down.
61'
They have certainly got plenty of players capable of holding onto the ball.
60'
I say again, wow. What a match. Arsenal just attempting to slow things back down now and keep possession.
59'
Vital interception from Djourou with Essien's through-ball heading straight towards Drogba.
58'
A poor lunging challenge on Song from Lampard.
58'
 Lampard
56'
Arsenal 3-1 Chelsea. Drogba floated in a free-kick and Ivanovic arrived to head home. Could it be game on. It's Arsenal's to throw away!
56'
 GOAL Ivanovic.
55'
Unbelieveable stuff, a breathless start to the second half.
55'
 Kakuta on for Malouda.
55'
Comment from ESPNsoccernet's Jon Carter: Chelsea look completely done. The last time the club looked this disjointed was in the final throws of Avram Grant's reign. Something needs to change and Carlo Ancelotti will bear the brunt.
54'
Lampard heads over the ball as Ancelotti looks on stoney faced.
53'
That's nine in 16 for Walcott, it was an electric turn of pace.
53'
Arsenal 3-0 Chelsea. Incredible! Malouda caught in possession and Fabregas fed Walcott, who slotted a cool accurate finish underneath Cech.
53'
 GOAL Walcott.
51'
Arsenal 2-0 Chelsea.Essien's challenge forced the ball into Walcott's path - he was clean through and he passed it inside to a free Fabregas, with Cech bearing down, and Arsenal's captain slotted it into an empty net
51'
 GOAL Fabregas
49'
Fabregas makes some room down the left, but Drogba is back on the edge of his own box to hook it away.
48'
Cech punches it out of the area but Arsenal are continuing to press.
48'
Another corner for the Gunners now, Nasri to deliver.
48'
Ramires with a heavy tackle on Wilshere, but no card is forthcoming.
47'
Alex Song celebrates giving Arsenal a first-half lead.
47'
Ramires releases Ferreira down the right - that's more attacking intent than he showed in the entire first half.
47'
Van Persie whips it in and Cech fumbles but eventually keeps it in his hands.
46'
Arsenal have an early corner after Walcott's cross is deflected out.
45'
I can wholeheartedly understand Ancelotti's withdrawal of Mikel, he ha sbeen pretty ineffective at protecting the back four.
45'
Right, we're off for the second period...
45'
 Ramires on for Mikel.
45'
HT: Half-time sub for Chelsea, Ramires is coming on for Mikel.
