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The goals all came in the first half from Sanchez, Walcott and Ozil and despite a lacklustre second period, they gathered the three points
What a performance from the Gunners as they get their first win over Chelsea in nine games
FT - Arsenal 3-0 Chelsea
90' - Three minutes added time
83' - great ball from Luiz into Batshuayi who is one-on-one but Cech does well to save
75' - Ozil put through but the flag was raised for offside
70' - Double switch for the Blues with Willian and Hazard coming off for Batshuayi and Pedro
70'- Sub for Arsenal with Iwobi coming off for Gibbs
68' - SAVE Ball through to Walcott but Courtois does well to save
57' - Conte looking to change the defence to three, questionable decision especially with Arsenal's dangerous attacking
56' - Arsenal should have buried that but nobody can get a shot off and it seems that Gunners are looking for a fourth
55' - Sub for Chelsea with Fabregas been brought off in place of Alonso
45' - Back underway at the Emirates
18:21 - Coverage of the second half between Arsenal and Chelsea will follow shortly
18:18 - What a half of football ! It was a masterclass from Arsene Wenger's side with goals from Sanchez, Walcott and Ozil very much ending the contest
HT - Arsenal 3-0 Chelsea
46' - Cech punches it to Hazard but he can only find the side-netting with his volley
45' - two minutes added time
41' - IT'S ALL OVER Brilliant football from Arsenal as Sanchez floats a ball over to Ozil and he hits shot into the ground and in off the far post
40' - GOAL Arsenal 3-0 Chelsea
31' - First sub with the injured Coquelin coming off with Xhaka been brought on
29' - Sanchez over the free kick but the defensive deflection takes it wide
27' - Ivanovic brings down Iwobi just on the edge of the area and is booked for his troubles
21' - First real chance from Chelsea, Hazard plays it out to Willian on the wing, but his effort from the tight angle is just wide of the far post.
14' - IT'S TWO !!! Brilliant football from the Gunners as the ball slid through to Bellerin who lays it on a plate for Walcott to tap home
14' - GOAL Arsenal 2-0 Chelsea
11'- GUNNERS ARE AHEAD Horrific blunder from Cahill as his backpass is latched onto by Sanchez and he dinks it over Courtois
11' - GOAL Arsenal 1-0 Chelsea
9' - Sanchez picks up the ball after Walcott is dispossessed but well over the bar.
7' - Chelsea look to be sitting back and let the Gunners come at him.
4' - First shot of the game, space opens up for Cazorla just outside the area and Courtois does well to palm it away.
3' - Cazorla puts ball in from the corner, but Courtois saves with ease.
1' - And we are underway at the Emirates
17:10 - Little under 20 minutes until kick-off at the Emirates Stadium
16:39 - One change for Antonio Conte's side, with Cesc Fasbregas getting his first start of the season replacing Oscar
16:38 - Arsenal remained unchanged from their win over Hull last weekend, with both Oliver Giroud and Granit Xhaka been benched
16:33 - Chelsea starting XI: Courtois, Ivanovic, Cahill, Luiz, Azpilicueta, Kante, Matic, Willian, Fabregas, Hazard, Costa.
16:32 - Arsenal starting XI: Cech, Bellerin, Mustafi,Koscielny, Monreal, Coquelin, Cazorla, Walcott, Ozil, Iwobi, Sanchez.
16:31 - It set to be another fiery clash between these London rivals, with kick-off little over an hour away, team news and updates will follow shortly
16:30 - Hi everyone and welcome to VAVEL's coverage of Arsenal and Chelsea
That continued last season, as a single goal from Diego Costa gave them the 1-0 victory, with Wenger looking to be a similar result this time around.
The Blues prove to be the Gunner's sticking point every campaign, with Arsenal failing to defeat their city rivals in nine matches, failing to score in their last six.
Wenger is expected to take his best squad to the Bridge, having made 11 changes for the midweek victory. Oliver Giroud will face a late fitness test with a toe injury with long-term absentees Aaron Ramsey, Per Mertesacker,Danny Welbeck and Carl Jenkinson all out.
Conte's biggest absentee will still be captain John Terry, who is still recovering from an ankle injury during their draw with Swansea City, despite hope he may recover in time. Despite that, the Italian should have a fully fit squad at his disposal.
The Blues traveled to the Kingpower Stadium expecting a tough game from league champions Leicester City, and got that with a brace from Shinji Okazaki in the first half before Gary Cahill and Cesar Azpilicueta got then back into the game. The match couldn't be decided in normal time, but quick fire extra-time goals from Cesc Fabregas saw them through.
However their form took a slight dip after the return from the international break, with a draw against Swansea City, and a narrow 2-1 Friday night defeat to Liverpool, but managed to get back on track midweek in the EFL Cup.
The clash at the Emirates Stadium expected to be one of the biggest games of the season so far, with Antonio Conte looking to avoid a third match without a win in the league since 2012 during his Juventus days.
It proved to be Lucas Perez's night on his debut for the Gunners, grabbing a brace while goals from Granit Xhaka and Alex Oxlade-Chamberlain gave them the 4-0 victory.
Wenger's side looked to follow up their convincing win over Hull City, with passage into the fourth round of the EFL Cup when they traveled to take Nottingham Forest, and proved to be another easy win.
After their below average start to the campaign, Arsenal have picked up the pace in recent weeks, remaining unbeaten in their last six matches in all competitions.
It has been a week of celebrations for the Gunners, with this week marking 20 years since manager Arsene Wenger joined the club, and will be looking to mark the occasion with a win over one of his biggest rivals.