Hello and welcome to our live coverage from the San Siro as Milan host Arsenal in the first round of their last 16 Champions League tie.

Still no sign of the Ox. Has Wenger made a mess of this selection? I know Djourou's been poor but should he have shunted Vermaelen inside? Seems a mistake.

Song to Gibbs, back to Song as Arsenal try to get Henry and RvP on the ball. Good defensive work from Boateng though and Milan have it back.

Song robs Boateng before he can get near the blundering defensive duo and Arsenal come forward. Rosicky lofts one in for RvP but Silva blocks his path, hitting the deck like a right softie in the process.

Gibbs wide left wins a throw off Abate. Arsenal need to just keep possession but as soon as they have it they go back to their hapless defenders: Djourou and Vermaelen almost give it away under no pressure.

Milan want more but a heavy touch from Emanuelson sees their latest move break down on the edge of the box.

Vermaelen has been terrible today - that is never a goal if he doesn't fall on his backside under no pressure.

Ibra on the left tries a one-two with Robinho, Vermaelen falls over and it opens up for Robinho to drive a fierce low goal inside the post!

Henry is hugging the left now, getting his first touch. Arsenal keep possession until Rosicky gives it away.

Milan start confidently, going for Arsenal from the off as Ibra almost finds Boateng again.

The second half is underway!

ARSENAL SUB: Yup, Henry on at half-time!! Walcott off. Still too narrow IMO. I'd have taken Rosicky off.

And, interestingly: @auspom84: "arsenal are a shadow of themselves where the hell is henry? he's Arsenals game changer so get him on the field"

Sooo many tweets from you - here are some: @niall_lawless: "Djourou constantly makes the same mistake,makes the first move and lets his man get away. He must think its still valentines"; how about Ibra? any1 still not convinced about him playin the big games? @PjKoul: "2nd game in 3 years that he's tearing ars apart"; @zanzibar2000: "ibra is man of the match"

Oh well, Arsenal appear to have frozen on the big stage that is the San Siro. Intimidating an amphitheatre as it is, the Gunners have been all over the place defensively - Vermaelen has had a bit of a shocker, and Djourou a mess since he's come on. Both goals were excellent though. What do you think about the half? Milan good, or Arsenal bad?

Anyway, the ref's last act of the half was that outrage and it's Milan 2-0 Arsenal. A tough half-time talk beckons for Monsieur Wenger.

Antonini is, disgracefully, carded for that collision. What is this ref thinking? It was a through ball, which he met first - the keeper was brave to rush out. What is he supposed to do, disappear?

Ibra with a superb through ball from deep, Djourou completely befuddled by that and Antonini is through but Szczesny flies out to gather and both collide! Great keeping, brave from both men.

Ibra with a brilliant show of strength to shrug off Djourou, who has been dragged into the Milan half and is well out of position - super ball to release Boateng, this could be a third but he smacks it into the side netting!

Two minutes added time being played. Van Persie has hardly had a touch. Bring Henry at half-time on for the inevitable goal?

ARSENAL SUB: Djourou is on for the injured Koscielny.

Robinho over the top for Emanuelson but he went too soon and it floats over to keeper. Rosicky tries to find Van Persie but Milan have a full selection of defenders.