Van der Sar was a virtual spectator as Roberto Mancini's City side failed to impose themselves on their neighbours in last night's 0-0 draw in the Barclays Premier League.
Afterwards, the Dutch goalkeeper said: "City did not really come forward and leave their defensive position.
"They were clearly aiming for a point. We really wanted to win but they were more defensive. I did not have much to do but apart from save one freekick and if the game had lasted longer we might have got more than a point out of it."