Ipswich right-back Axel Tuanzebe, only just back after a suspension following a red card in the 1-1 draw at Aston Villa, clatters into Alejandro Garnacho and is lucky to escape with just a warning against his former club.

He was at United up until 2023, working his way up from the academy, and scored a penalty in the Europa League final shootout in 2021, which United lost 11-10 to a Villarreal side managed by Unai Emery.

Kristoffer Ajer heads wide now as the Bees begin to threaten.

Brentford midfielder Mikkel Damsgaard has an effort blocked now.

And the first big chance of the game comes as a cross finds Yoane Wissa but his header is straight at Jordan Pickford.

Aaron Lennon
Former Tottenham midfielder on BBC Radio 5 Live

Good goal.

Jeremy Doku has been getting at Pedro Porro. Porro is giving Doku too much space.

Rolled into Erling Haaland, and it was a tidy finish.

Image source, PA Media

Arsenal midfielder Declan Rice has a pop from about 22 yards out which hits a Forest man and goes behind for a corner. The game started to liven up a bit.

Arsenal trying to work an opening but Jurrien Timber is tackled as he shoots.

Forest counter and Gabriel slides in to stop Chris Wood in the box. The hosts really are a phenomenal team on the break.

Glenn Hoddle
Former England and Tottenham manager on TNT Sports

Image source, Getty Images

Man City switch the ball out well to Jeremy Doku, who has far too much time and can play with his head up.

And Erling Haaland won't find a simpler goal than that. Kevin Danso is caught ball watching and you can't give Haaland that much space and time. It was poor defending from Tottenham.

Manchester City have conceded the game's opening goal on 12 occasions in the Premier League this season, already the joint-most in a single campaign under Pep Guardiola.

Much to the Spaniard's relief, they won't be adding to that record tonight.

I don't feel you'd have predicted this game to be a classic. And you'd be right not to have.

Manchester United have a chance to get a quick equaliser but goalkeeper Alex Palmer, who has been in fine form since a move worth a reported £5m from West Brom on transfer deadline day, flings himself to his left to push out Harry Maguire's powerful header following a corner.

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This is the earliest there has been two cards brandished in a Premier League game (3:22) since Ryan Shawcross and Geoff Cameron were both booked for Stoke City v Liverpool on Boxing Day 2012 (03:16)

Arsenal winger Ethan Nwaneri, on the right side, has a shot blocked. This game yet to get going really. Two cards, three blocked shots.

Andrew Mitchell: What on earth happened there? The ball was travelling for an age. Can only assume there wasn’t a shout from the keeper, but even so, Dorgu had all time in the world to take a glance and see where Onana was.

Aaron Lennon
Former Tottenham midfielder on BBC Radio 5 Live

Image source, Getty Images

Patrick Dorgu has not once put his head up.

I don't know where Andre Onana is going. It is a shambles.

Simon Stone
BBC Sport's chief football news reporter at Old Trafford

That was abysmal.

We are talking basic communication.

Andre Onana can see the whole pitch ahead of him. He has to either scream at Patrick Dorgu to get out of the way so he can clear it, or back off.

I cannot begin to imagine what Ruben Amorim is thinking.

Arsenal's first opportunity as Declan Rice skips his way into the box before seeing a shot blocked.

Forest counter and Chris Wood's effort hits a Gunners defender.

Image source, Getty Images

That was Ipswich's first goal at Old Trafford since Chris Kiwomya gave them the lead all the way back in a Premier League game in 22 August, 1992.

Ipswich's advantage only lasted one minute on that occasion before it ended 1-1.

Jeremy Doku does all the hard yards on the left-hand side but his pass for Erling Haaland isn't quite right and he had other options.