Palermo boss Delio Rossi believes his side need to play the perfect game to get a result away to Milan on Wednesday evening.
The Rosanero have struggled of late, losing four games on the bounce before Sunday's 1-0 victory over Genoa at the Renzo Barbera.
"It's important to find the right balance in a team," Rossi said. "Personally I am still looking for the best solution.
"Sunday's victory gives us a great consciousness [of our means].
"Milan and Palermo are different teams with respect to last season. I don't know if we could win again at San Siro by playing in the same way.
"Milan are a different team. They have added Zlatan Ibrahimovic and Kevin-Prince Boateng to an already good squad. They have signed Robinho.
"The big clubs run on forward and we must make Milan's players run backwards. This has to occur to beat Milan.
"Ibrahimovic is one of those players who, aside from technique, also possesses height. We must play the game of our lives."