Seedorf, himself, has clashed with Milan fans this season, but believes they can now count on the Rossoneri support.
"Today, it was important to bring home a good result. In the second half we were a bit tired, but we still played with the right spirit," said Seedorf. "With an audience like this, you feel like it's a twelfth man who supports you.
"Milan have kept ourselves alive, it is all in our hands and Marseilles will have to come to our house to make the game."
Ronaldinho struck for Milan after Karim Benzema had opened the scoring for Real.