- Second-half strike from Juan Mata sees United progress into the next round.
- Pep Guardiola's Manchester City now without a win in their last six games in all competitions.
- United get some payback after defeat in first derby of the season in September.
That's it! Jose Mourinho earns himself a reprieve in knocking his old foe out of the EFL Cup. Guardiola continues on the worst run of form of his career.
Full-time: Manchester United 1-0 Manchester City
United continue to press City in the dying minutes with Pogba sliding across in an attempt to snatch a pass out from the back meant for Otamendi. The Frenchman catches the Argentine and earns himself a booking. Ibrahimovic makes a nuisance of himself, blocking City's attempts to take the free kick quickly and earns himself a yellow too.
Four minutes of time added on at Old Trafford.
Carrick diligently tracks Aguero down the left flank, despite having no one else on the planet having him as the favourite in a foot race between the two. Aguero slips as he decides what he is going to and accidentally slides into the United midfielder, conceding a free kick.
Six minutes of this match remain at Old Trafford.
United are sitting back and absorbing pressure at the moment. Is this a bit risky with just under 10 minutes of the match remaining?
Here's another change for United with Jesse Lingard coming on for Rashford, who looks like he is struggling with cramp.
City patiently probe before Garcia swings a wicked ball in for Aguero. The Argentine can't stretch himself far enough to reach it and Sterling, who picks it up out on the flank, loses possession immediately. United react swiftly, working the ball to Ibrahimovic who holds it up brilliantly before freeing Rashford down the right flank. He drives a cross in for Pogba the ball is cut out in a nick of time.
Here's United's first change of the game as Morgan Schneiderlin comes on for Mata.
Here we go, Pep Guardiola rolls the dice by throwing on Sergio Aguero for the final 20 minutes. He replaces Nolito.
Aaaand it hammers this one over the bar too. Woeful.
City now have a free kick of their own about 25 yards out from goal. Kolarov thrashed one miles over the bar from open play a few minutes ago and he is standing over this set piece...
Otamendi gives the ball away and United quickly swarm with Ibrahimovic playing a delightful flicked through ball for Rashford. The youngster veers off the wrong side of the ball however and it gives City the precious seconds needed to clear.
What a chance for Ibrahimovic to make it two! It's a superb ball in from Rashford out on the right and the Swede is unmarked near the far post but connects with nothing but fresh air as the ball whizzes by him.
Change for City, Raheem Sterling comes on for Sane.
City patiently probe in front of United who have everyone back but Ibrahimovic. It's neat stuff from the away side but Kolarov ends it with a ridiculous effort on goal that flies miles over the bar.
Raheem Sterling is getting ready. Expect City's first change any minute now.
Old Trafford is rocking again just as Pogba goes down in the penalty area. Did Kolarov stick out a leg there? There was a coming together between the two there but not enough for a penalty it seems.
United have the lead! They have started this half with much more aggression and determination and it's paid off eight minutes into the half. Ibrahimovic does brilliantly, holding off Otamendi as a high ball comes in and getting into space into the box. He forces the ball across the box to Herrera who holds off a challenge from Kolarov, letting it run across his body for Mata who drives one home into the bottom corner.
Goal! Manchester United 1-0 Manchester City (Juan Mata, 53)
Rashford produces some magic out on the left, dancing past two City defenders out on the left before threading the ball inside for Pogba. Valencia is screaming for put on the right flank but the Frenchman instead opts to shoot, curling his effort well wide of the target.
Pogba denied by the post! It's the best move of the game from United with Mata working the ball in from the right to Ibrahimovic. His first touch is superb, knocking it past Otamendi, who sold himself, and ushers it onto Pogba to his left. He drives in and fires for the near post, but the City goalkeeper gets just enough on it to push it onto the post.
A shocking ball from Mata is seized upon by City who race forward on the counter. It's three on three but they pick the wrong ball and Nolito is offside.