20'. Another good chance for Barcelona. 4 players combine well with one-touch passes but the final ball across by Messi is caught by Amelia.
19'. Freekick for Barcelona after a Kaka handball on the edge of the box. Messi doesn't cross it in and surprises Amelia but it hits the side netting.
13'. Barcelona stringing a number of passes but amounts to nothing.
12'. Milan aren't holding back, even with the shock lead. Barcelona however, hold possession near the center field.
10'. Barcelona need to slow the game down and regain control and composure. The Milan crowd going insane though, thoroughly enjoying this!
9'. Goal can really be attributed to Mascherano. What on earth was the Argentinian doing? Deserved goal after just 10 minutes where Milan have been very imposing.
8'. ROBINHO SCORES FOR AC MILAN!!! BEAUTIFUL PLAY BY KAKA TO LINK UP WITH HIS BRAZILIAN TEAMMATE!! 1-0 AFTER JUST 8 MINUTES!
7'. Muntari scores but it's offside! So close for Milan, beautiful play by Robinho who's been very lively early on.
6'. Barcelona slowly taking control of possession. Passing the ball around well - as they do.
3'. Robinho showing his Brazilian flair with a rainbow flick over Alexis Sanchez!
2'. Kaka returning from injury forces a corner after a nice play on the right side.
1'. Barcelona wearing admittedly hideous yellow and orange stripes. They are however, Catalan colours!
19:46. German referee Felix Brych blows the whistle, the game begins!
19:43. The players make their way onto the green grass of the San Siro. The iconic Champions League anthem is playing!
19:42. Giant banner says "KEEP CALM and always fight!"
19:40. The players await in the tunnels, the San Siro is making itself heard!
19:39. We're just minutes away now!!!
19:37. Milan have a goal difference in the league of +1, in comparison, Barcelona boast a goal difference of +22.
19:25. Just about 20 minutes left till kickoff in Milan, send in your predictions to @VAVEL! Who do you think has the upperhand?
19:23. Barcelona will be without Oier, Puyol, Dos Santos and Sergi Roberto.
19:21. The big name that's missing the clash is mercurial striker Mario Balotelli who's out injured. Allegri opted to play with a false 9 with the Italian striker unavailable.
19:16. 5 Brazilians will be starting the game. Kaka' and Robinho for Milan, and Neymar, Adriano and Dani Alvez for Barcelona. Neymar has been touted to become one of the best players in the world, but will he suffer the same fate as his compatriot and opponent tonight, Robinho?
19:11. Barcelona are still unbeaten this season, winning 10 and drawing 3 in all competitions. Milan haven't shared such fortunes, having won only 5 and lie just 8th in Serie A.
19:09. In the last 6 games between the two, Barca won 3, Milan 1 and they drew 2. Barcelona scored 12 goals in that span, while Milan scored 7.
19:08. Barcelona won the last fixture between the two in a 4-0 rout at the Camp Nou on March 12th 2013. Lionel Messi scored a brace.
19:00. Barcelona will be going out with Valdés; Alves, Piqué, Mascherano, Adriano; Busquets, Xavi, Iniesta; Sanchez, Neymar Jr, Messi
19:00. Milan's XI will consist of: Amelia; Abate, Zapata, Mexes, Constant; Montolivo, De Jong, Muntari; Birsa; Robinho, Kakà
18:57. Earlier, Milan president Adriano Galliani commented on the frequency of this fixture "We are facing them at home for the fourth time in 24 months. Destiny wanted it like this; we were not able to fight it."
18:55. Just about an hour until the game kicks off in Milan! Are you excited? Join us here and take part in the discussion on Twitter by tweeting @VAVEL or myself, @joepagnelli! I look forward to a great spectacle of football!