After AC Milan's second goal, they nearly get another with Zlatan Ibrahimovic coming within inches of getting on the end of a cross swung in by Kevin-Prince Boateng. The reason that he doesn't is because he's being pulled back by Bacary Sagna, but despite protests from the big striker, no penalty is forthcoming. It probably won't matter too much - it looks like there are more goals in this for the hosts.
Arsenal, meanwhile, are forced into a change, with Johan Djourou coming off for the limping Laurent Koscielny. It doesn't help much against Ibrahimovic, and the Swede once again rips open the Gunners defence with a pass to Boateng who can only hit the side netting. A few minutes later, Milan come close again, with Wojciech Szczesny engaging Luca Antonini in a very brave challenge, one he gets a knee in the face for his troubles for. Antonini picks up a yellow card for that, which was a little bit harsh.
And here's halftime. Milan 2-0 Arsenal, and the scoreline is entirely fair based on the first 45 minutes of play. Arsene Wenger has a lot of work to do here.