Postpublished at 20:29 Greenwich Mean Time 22 November 2014
That's a night from the Premier League. Thanks for all of your company today, and don't forget you can follow the return of David Moyes and tonight's boxing on our live pages.
Good night.
Man Utd move up to 4th, Arsenal drop to 8th
Giroud smashes home in injury time
Rooney clips in second on counter-attack
Gibbs deflects Valencia shot into his own net
Keeper Szczesny taken off in second half
Tom Rostance, Marc Higginson and Michael Emons
That's a night from the Premier League. Thanks for all of your company today, and don't forget you can follow the return of David Moyes and tonight's boxing on our live pages.
Good night.
Manchester United's Ashley Young:, external Brilliant team performance, great feeling to win away at Arsenal. Think the photo says it all...
Former Manchester United boss David Moyes has former Arsenal forward Carlos Vela in his side this evening.
He begins his La Liga campaign in just over half an hour and you can follow the action in our European live text page here.
In the early game on Sunday, Crystal Palace face Liverpool in a repeat of the game which eventually cost Liverpool the title last year.
Then Hull face Tottenham at 16:00 GMT.
Both of those games will of course be covered here.
It has been great to have the Premier League back. A fine day of action, 15 goals and plenty of talking points.
But what else is coming this weekend?
Tony, Lincoln: United fortunate to win. Arsenal must get their defence right. Convinced they will make top 4 at the season's end. No good getting shot of Wenger. He will sort it.
Akbar: In the transfer window that Wenger signed Ozil for 42 million he also signed Flamini for free. That in a nutshell shows how shockingly flawed Wenger's transfer and tactical philosophy is.
Arsene Wenger says that he does not expect Wojciech Szczesny to have a bad injury but he does not know about Jack Wilshere's ankle.
Photogenic:, external The good news is that you won't need many points to finish in top 4 this season. One strong team & 19 average teams.
Ellis Hickey:, external Arsenal need a manager who will provide a second plan instead of passing and wishing for the best.
Ade Ojelabi:, external The WHOLE of @Arsenal should apologize to supporters (forking out money to buy the most expensive tickets) and fans at large
Louis van Gaal says he very frustrated at having to constantly change his line-up and formation because of the injury list at Old Trafford.
A classic Arsene Wenger response to Jack Wilshere's clash with Marouane Fellaini.
"Honestly, I didn't see the incident."
Joe Harries:, external Hate all this Wenger out nonsense. No one can blame the manager today, the only ones to blame are the players. Poor performance.
Neo Legolas:, external Saying Wenger Out simply doesn't solve the problem but to think of it that's the only change left now.
Andy Bradley:, external Why haven't Arsenal picked up quality defensive players now we have money? Questionable decisions costing us dearly recently.
Arsenal manager Arsene Wenger: "It was one-way traffic and we lost the game, we have to take it on the chin. I know we'll be criticised for it but you have to respect the energy levels we put in.
"We paid for the slightest mistake and it's very frustrating to come away with nothing.
"We had the best chances and we could have finished better. At 1-0 we should have been more cautious not to give the second goal away. There was plenty of time to come back and that's where we made the mistake.
"In our job when you don't win, you're very concerned but there are a lot of positives in this team. If we can keep this going with the quality and the energy levels we have, we can bounce back very quickly."
"It was one-way traffic and we lost the game."
That's the opening line of Arsene Wenger's reaction. He also says he expects criticism.
More from Manchester United boss Louis van Gaal:
"Luke Shaw has an ankle problem. It is not the same injury as what he had in advance of the game. We have to wait and see. It is unbelievable the injuries we have had.
"It is the first away victory and the players are very excited but it is just one victory. We have to confirm that with further victories and then we can say we have the spirit and can start looking upstairs and not downstairs."
Icemandb10: We were poor defensively last season, yet we lost Vermaelen and Sagna in the summer and failed to replace them. Wenger didn't build on last season he weakened the squad, he has not learned from his mistakes over the last decade.
Frustrated Gooner: For those saying that Wenger can't be too blame, we have had the same problems with defensive frailties, lack of leadership and general profligacy for the last 4 seasons. The one constant has been Wenger, who also had a £100m budget to address these flaws last summer. Accidents and flukes happen, but not season after season. Wenger must go.
Graham in London: Not worried at all. The difference between the two is that Arsenal will win games playing like that and United will lose them
Manchester United manager Louis van Gaal: "I think it is a fantastic victory at the right moment. We have a lot of injuries but despite of that we win a difficult away match. Arsenal are a good attacking team. At the end I can laugh but you can imagine if they score one of four or five chances in the first half it is a different game.
"They have had five big chances yes, but we have also had possibilities at the end of the first half. Not so big but we could also score. In the second part of the first half we were coming back. We don't have the confidence in the first half and I said we needed to build up the ball and because of that we got chances. It is no surprise for me that we scored in the second half. I was not pleased with the ball possession of our team but after that we improved and in the second half we did very well."
The haul of 17 points from 12 games is Arsenal's worst ever start in the Premier League.
In a very entertaining interview, Manchester United boss Louis van Gaal says the injury worries he has are unbelievable and that Luke Shaw's injury is a new one, not related to the trouble he has had before.
He also seems astounded when he is told that United are into the top four...
Louis van Gaal is refreshingly honest isn't he? He says he can laugh now but if Arsenal had taken any of their first-half chances it would have been a very different game.
Full reaction to come.
Manchester United striker Wayne Rooney: "We rode our luck at times, our goalkeeper was fantastic.
"We felt they were vulnerable on the break and we hit them with two good goals, which was our game plan.
"Paddy McNair and Tyler Blackett have coped really well. This will give us a lot of belief and confidence, it's come at a good time for us, It's been an indifferent start for us but we hope we can go on a good run now. We want to build a bit of momentum going into the new year and see where we are then."