Ibrahimovic struck against his old club to earn a point for Milan against Ajax last night.
Seedorf said: "At this moment we are still under construction. I am trying to keep everyone calm, as we need to focus and do everything in a solid fashion. As we saw again tonight, nobody will gift us anything."
Ronaldinho was dropped to the bench for what seemed to be a 4-3-2-1 system, but Seedorf explains it was actually a 4-4-2.
"You can have a 4-4-2 in a diamond midfield, 4-3-3, whatever, the fact remains you have to take advantage of the spaces that open up in front of you.
"Milan have always played with this system over the last six years. In pre-season we had a few like this under Massimiliano Allegri, he knows he has a team that can play this system and tried to change.
"In general I didn't like our style, as we play too many long balls and mustn't make the mistake of thinking Ibra can resolve everything. Otherwise we'll end up like Inter, especially in the Champions League."