Not just because of the bragging rights but because of the impetus he believes it would give his side in the run-in for the Barclays Premier League title.
Mancini said: "I like to play this game. I like to play at Old Trafford because it is better to win there than at home.
"Because when you win away in a derby it is more important for our head and our personality.
"You look at a team (United) that was winning everything and a team (City) that hasn't won anything for a long time. This can change at any moment."