Laurent Koscielny can't defend Zlatan Ibrahimovic at all and there's some bad blood between the pair now as things get increasingly physical, Ibrahimovic complaining of an eye-poke from the Arsenal centre back after Viktor Kassai had once again somewhat dubiously adjudged the Swede to have committed a foul.
And then we're at 2-0. Bacary Sagna keeps Ibrahimovic onside (maybe) as he surges down the left flank, and while the defence protests the linesman's call a simple cross to Robinho results in a goal. The Brazilian really didn't have much to do - the ball was put on a plate for him about three yards out, and he made no mistake in guiding it into the bottom corner. Not a whole lot Wojciech Szczesny could have done about that one.
That Robinho goal makes up for an early mistake from the former Real Madrid man. A few minutes prior to scoring, he managed to rob Thomas Vermaelen to create a two-on-one attack only to overrun the ball and allow Koscielny to cut things out. They won't mind that error too much now - Milan are completely in charge of this tie.