Arsenal fan here,
Watched your match tonight and thought Mancini was very stubborn in his approach, the Italian was thinking more about himself and his personal battle with Ferguson than the team itself which isn't a rare thing to do in Italy - I see this particually in the Adebayor decision.
As you'd expect the team was very solid from the back but I did notice Kolo Toure doesn't have the freedom to bring the ball out from the back anymore? I would have have this could of been vital in breaking up Manchester United's mechanical midfield by creating a little confusion adding an extra man in there - he was very good at it with us.
It was a very tactical game and few chances to be made but I would be concerend about the lack of support for Carlos Tevez, I think it's fine when your wingers cut in from the flanks playing in and around the box you look dangerous, but it doesn't happen enough as the wide men are not sure when they should be playing as wingers and when they shouldn't but this will come in time.
Full backs were very reluctant to go forward, De Jong had an excellent first half but he sort of went missing there after partically in the spell when United were really on top of poession and he probably tries too hard to be everywhere.
Gareth Barry had a fine game though.