SUBSTITUTIONpublished at 67 mins
Arsenal 1-3 Manchester City
Emile Smith Rowe is on for Arsenal.
Arsenal 1-4 Man City - Jesus heads in , Lacazette header to level, Runarsson lets Mahrez effort squirm in
Foden adds third, although replays show he was offside; Laporte nods in fourth
Brentford 1-0 Newcastle - Dasilva volleys in to put Bees into first ever major semi-final
Alex Bysouth
Arsenal 1-3 Manchester City
Emile Smith Rowe is on for Arsenal.
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Poor goalkeeping for all three City goals. Granted the third was a great goal but why did the keeper go to ground so early? Should've played Leno.
Chris, North Wales
Mustafi at fault for goals one & three, Runarsson at fault for goal two - it shouldn't be Arteta out, he isn't the problem here, the players we have are just sub-standard and no good for this level.
Peter, Oxford
Arsenal 1-3 Manchester City
Bernardo Silva, like a diminutive scrum-half, bundling into the back of Dani Ceballos and finding his way into the book for his rugby-style challenge.
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Seth: That Foden's goal highlights the importance of VAR that so many have criticised. That goal wouldn't have stood if VAR is in use in this match! Poor Arsenal.
Colin Reardon: What's the lino doing!? So clearly offside. They have one job.
Arsenal 1-3 Manchester City
It feels like a long way back for Arsenal now. Clinical from Manchester City since the break.
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Peter Collins: Arteta must be wondering what he's done to deserve this bad luck. Yes, he could do better, but can he really be blamed for persistent clangers from highly paid professionals?
Arsenal 1-3 Manchester City
Rob Green
Former England goalkeeper on BBC Radio 5 Live
It's brilliant from Fernandinho. He picks the ball up from 25 yards out of his own goal and just drives and runs forward.
Hang on, the replay is showing Phil Foden is offside - but there is no VAR.
Alex Runarsson doesn't need to come out, it's a bouncing ball, he makes the decision but is never going to get there. It's a brilliant finish by Foden but he has got time to have a look and just lofts it over him.
Arsenal 1-3 Manchester City
Well... if there was VAR tonight I think Phil Foden's effort would have been chalked off.
He looked offside from Fernandinho's pass, but it was a brilliant finish.
Phil Foden (59 mins)
Just brilliant!
Phil Foden is sent through in behind the Arsenal defence, takes a wonderful touch to set himself and then coolly dinks it over the onrushing Alex Runarsson to extend City's lead.
If the second was lucky, that was just sublime.
Arsenal 1-2 Manchester City
Is it too obvious to make a Christmas pun about Runarsson gifting City the lead here?
Arsenal 1-2 Manchester City
Rob Green
Former England goalkeeper on BBC Radio 5 Live
That's a nightmare for Alex Runarsson, I feel for him. His hands go up above his face but come down far too quickly. He just needed to hold them up there, because if you don't get a clean catch, then you don't want it to go in front of you. He just put them up, put them back down again and with that, the timing has got to be perfect and it wasn't.
Riyad Mahrez (55 mins)
Oh no! Nightmare for Alex Runarsson as it squirms through his gloves.
Riyad Mahrez strikes the free-kick well but the Arsenal goalkeeper is right behind it. He looks to have it covered but somehow the ball sneaks through to put Manchester City ahead.
A moment to forget for the Icelander.
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Rezaa Sait: Hasn't Arteta learnt from Partey not to rush a player from injury? Such a shame for Martinelli. I'd have kept him for Chelsea!
Daniel: Feel sorry for Martinelli. He's worked so hard to get back to playing, sets up the equaliser and now has to come off. Let's hope he's back again soon.
Arsenal 1-1 Manchester City
Neat footwork from Phil Foden as City work it left before Dani Ceballos pinches it off Gabriel Jesus. Arsenal look to break quickly but it comes straight back at them and Gabriel brings down Bernardo Silva on the edge of the box. They're lining up to hit this...
Arsenal 1-1 Manchester City
Rob Green
Former England goalkeeper on BBC Radio 5 Live
When you have a goalkeeper like Ederson sat on the bench, who can clear it a really long way, the threat over the top is such that it actually plays in the mind of City's opponents.
But if they don't have that - and Zack Steffen is not Ederson - then Arsenal can press without that fear of the ball going in behind.
Arsenal 1-1 Manchester City
A bit disjointed in the opening few minutes of this half, neither side able to really string an attack together. But Sergio Aguero is warming up.
Arsenal 1-1 Manchester City
Yep, the 19-year-old makes way for Nicolas Pepe.
Arsenal 1-1 Manchester City
Ambitious from Dani Ceballos, trying a spinning backheel from a bouncing ball but and instead putting it out for a throw. And this isn't good for Gabriel Martinelli, he's down again.
Think this might be his night over.
Arsenal 1-1 Manchester City
Manchester City coming flying forward from the kick-off but a loose touch from Bernardo Silva briefly turns the Emirates into a Sunday league pitch in Stevenage as a mass of players from both sides hare after the ball.
Arsenal 1-1 Manchester City
Arsenal get the second half under way.