Before every Arsenal fixture, we’ll bring you a Scouting Report on the Gunners’ next opponents.
Former Arsenal midfielder Stewart Robson will give his pre-match view and you can get his post-match verdict in our Talking Tactics feature on Arsenal Player.
Arsène Wenger and his side face AC Milan at Emirates Stadium on Tuesday so, to find out more, we also asked journalist Paolo Bandini for his thoughts and analysis.
"I have seen a lot of Milan this year and at no time have they played as well as they did against Arsenal at the San Siro. Key to their performance that night was the display by Zlatan Ibrahimovic, who led the line brilliantly by doing exactly what Robin van Persie does for Arsenal. He looked to run behind Laurent Koscielny and Thomas Vermaelen when they held a high line, yet also dropped into midfield when the space opened up between Alex Song and his centre halves. Throughout the game he showed excellent technique, awareness of others and strength to hold off defenders. However, his effort levels from one week to another can fluctuate dramatically.
"Milan usually use a narrow midfield three with a playmaker in front of them. In the first leg, Kevin-Prince Boateng was this player and he did brilliantly, scoring a goal, making dynamic runs forward and producing passes that hurt Arsenal’s back four. Since that game he has been struggling with injury so Urby Emanuelson has started in that role."
PAOLO BANDINI, THE GUARDIAN
"Sadly I think 4-0 is a bridge too far at the moment, especially when Milan are playing so well. Before the first game the mood in Italy was that they were not playing that well at all, so that game was something of a starting point for them.
"They played very well for a couple of weeks without Zlatan Ibrahimovic, who was suspended domestically, and he came back at the weekend and scored a hat-trick in 13 minutes. On this form I think it is going to be a struggle for Arsenal not to concede with the way Milan are playing going forward.
"Arsenal don't have a lot of choice in this game, they just have to go for it. It hasn't really been Arsène Wenger's way this season to change his formation but he might be left with little choice this time. He just needs to pick the players that, within that formation, will give him the most attacking options. In the last few games they have done well in that respect.
"I think what I said before the first game still runs true and Milan are vulnerable down the flanks. I don't think they have especially good full-backs in Ignazio Abate and Luca Antonini and Arsenal should be able to find some space there with players like Theo Walcott and Alex Oxlade-Chamberlain. Wenger has the players available to him to do just that, it just didn't happen in the first leg.
"Ibrahimovic is playing as well as he ever has. He has 18 goals in 20 games in Serie A, which is his best record after that number of matches, certainly in Italian football. But how do you play against him? It is a bit tougher now because he drops off more. I suppose the classic example has always been to isolate him and the way to frustrate him has generally been to cut off the supply to him. If he doesn't get the ball then he gets frustrated. The bad years for Ibrahimovic have been in the Champions League where he has cut a lonely figure up front and therefore has been known to sulk in the past.
"But at the moment Robinho is playing so well too. I remember saying before the last game that one of the flaws in his game was that he didn't know where the net is because he had so many chances for Milan last season. But then of course he came up with two goals so I better not say anything along those lines this time! But he has been playing better and better over the last couple of seasons. I think he he has found a place where he is comfortable at Milan and has the freedom that works for him.
"The one thing they are going to be lacking in this game, however, is Kevin-Prince Boateng, who looks almost certain to be out. Without him you lose something behind the attack because he links up the midfield and attack in quite an uncommon way. Normally you have a creative player in that position but it his pressing game that does it for Milan by having such a dynamic and muscular player there. Without Boateng they may go for Urby Emanuelson if he wants to try and create something similar, although for me he is still a bit lightweight.
"My guess would be that Arsenal will win the game but not the tie, so I will say 2-1."