- Manchester United end Arsenal's run of 12 successive home league victories in arguably the game of the season so far
- Antonio Valencia intercepts a poor pass from Laurent Koscielny before driving the visitors into an early lead
- Jesse Lingard doubles the advantage after Shkodran Mustafi is hopelessly caught in possession
- Lacazette reduces the deficit shortly after the interval following a terrific lay-off from Aaron Ramsey
- David De Gea makes several more great saves before another United counter-attack is finished off by Lingard
- Paul Pogba is dismissed for a nasty foul on Hector Bellerin and will be suspended for a three-match stretch that includes next weekend's Manchester derby
- RECAP: Chelsea 3-1 Newcastle, Brighton 1-5 Liverpool, Watford 1-1 Tottenham
That is all from me for now, but keep your eyes peeled for post-match reaction from Wenger and Mourinho from IBTimes UK's man on the ground at the Emirates, Eduardo Fernandez-Abascal.
We will be back in midweek to bring you live coverage of the final round of Champions League and Europa League group stage matches. Until then, it's goodbye.
It's the end of Arsenal's 12-game league winning streak at home and they stay fifth, one point adrift of in-form Liverpool. They host BATE Borisov in a final Europa League group stage clash on Thursday before travelling to Southampton.
United are also in action on the continent in midweek, hosting CSKA Moscow on Tuesday.
Game of the season so far?
Ruthless from United, who could easily have lost tonight and had no complaints. They regain their three-point buffer to third-place Chelsea and move within five of leaders City, who should beat struggling West Ham at home tomorrow.
An otherwise brilliant evening for them is tarnished somewhat by the fact that they will once again be without the influential Pogba for a three-game stretch that begins with the Manchester derby at Old Trafford next Sunday.
Arsenal 1-3 Manchester United
Ozil feeds Ramsey, who launches a shot harmlessly over the crossbar. Mourinho looks to run down the clock by introducing Marcus Rashford.
Young heads to the bench.
Another Arsenal penalty appeal is waved away after Smalling foolishly slides in on Lacazette.
Brainless defending from United during these latter stages. Five minutes of added time signalled.
Darmian clearly catches Welbeck in the box but referee Marriner, who has got most of his decisions right so far this evening, fails to point to the spot.
That looked stonewall.
Welbeck fails to work De Gea with a header and Mourinho wants a red card for last man Koscielny, who drags down Lukaku.
Too far out to be deemed a goal-scoring chance and the French centre-back gets away with a yellow.
We missed it a few minutes ago, but Mourinho sent on Matteo Darmian in place of Lingard after that Pogba red card.
Arsenal continue to search for another breakthrough that could spark a late collapse from United's 10 men. Welbeck's deflected shot is helped on its way over by De Gea.
Kolasinac is the man to make way for Giroud as Arsenal further increase their attacking prowess.
Cech comes racing off his line to hook the ball into touch as Herrera looks to release Valencia down the right flank.
Pogba has been colossal at times here, but his night ends prematurely as he is deservedly dismissed for a nasty challenge on Bellerin.
An automatic three-match ban means he will miss next weekend's Manchester derby in addition to games against Bournemouth and West Brom. Mourinho will be fuming.
Arsenal have 15 minutes or so to make their numerical advantage count.
Red card: Paul Pogba (Manchester United)
Welbeck for Xhaka is Arsenal's second change of the evening. Looks like Olivier Giroud is going to come on shortly too.
Ozil brings down Herrera with a mistimed sliding challenge and Matic catches Lacazette with an arm to the face.
Bellerin is then cautioned for wiping out Young.
De Gea repels another shot from Sanchez and Arsenal force another corner.
Mourinho withdraws Martial in favour of Herrera.
The atmosphere is sucked out of the Emirates as United, having rode their luck and relied upon several stellar stops from De Gea, restore their two-goal lead on the counter-attack.
Pogba absolutely schools Koscielny and Cech is unable to cut out a squared pass that is tapped in by Lingard, who now has a brace.
Goal: Arsenal 1-3 Manchester United (Jesse Lingard)
Matic produces a strong defensive header and comes off worse from a painful clash of heads with Koscielny.
He jogs back on after receiving treatment on the sidelines.
De Gea called into action again as he holds a fizzed delivery from Ozil.
Rojo is booked for a bad foul on Sanchez as Ander Herrera embarks upon a vigorous warm-up. His introduction looks imminent.
United have to do something to stem this Arsenal tide.
A massive double save from De Gea keeps United in front. Lacazette is denied in phenomenal fashion before Sanchez somehow cannot steer the ball home from close range.
Iwobi forces another good stop from De Gea, who is certainly being kept busy.
Where is the defending from these two sides?!
Cech makes a tremendous save to thwart Lingard and Martial's follow-up effort at the back post is blocked by Monreal.
This game is an absolute belter and I'm struggling to keep up.