A clash between European giants, they've won the Champions League eleven times between them.
Neither of Barcelona's summer signings started, Alexis is out injured and Fabregas made the bench. Mascherano and Busquets start at centre half.
Familiar faces for Milan, Nesta and Seedorf both 35 start, Ibrahimovic and Robinho out injured, Pato started up front.
Pato got on the end of a lofted ball by Abbiati and blitzed past the Barca defence to place it past Valdes in 25 seconds. 0-1 (1)
Messi gets the ball on the edge of the box and drives forward, he skips past Nesta and then brushes off Abate. It looks as though the ball gets away from him but he somehow gets to it, even when gets there it looks as though nothing is on, but great players make something out of nothing and he plays it along the six yard box for Pedro to tap in. 1-1 (36)
Villa had a quiet game but stepped up to take a free kick from 25-30 yards, he fired empatically past the helpless Abbiati. 2-1 (50)
Thiago Silva heads an equaliser in the 92nd minute from a corner to steal a point at Nou Camp. (90+2)
Shocked in front of their own fans by the early goal, Barca kept the ball in their usual style but couldn't break down the disciplined Italians. Their best chance came as Messi hit the post from a free kick. Whilst others around him were wasting half chances, Messi was able to get a couple of shots on target.
Going in at half time, Milan soaked up the pressure from the Catalans well, although they never threatened, Pato's pace did expose Barcelona's makeshift defence at times.
Not long after Villa's goal, Messi went on another one of his sensational runs, just as it looked like he was going to shoot, Nesta lunged across to tackle.
Dani Alves got away with only a booking for a two footed tackle. Milan started to press with more urgency by the 70th minute.
Barca stroked the ball about nicely as they do, but didn't create any clear chances. Milan's only chance of scoring was either a counter attack or a set piece. It was a corner that lead to the equaliser.