Only two points separate the teams going into the Stadio Barbera, as they tussle for a top four finish.
"Just four months ago we were in 14th place and now we are challenging for something truly important," said Rossi.
"There was some tension within the squad, as we are a young side and unaccustomed to fighting for something as prestigious as a Champions League position.
"This was a semi-final, on Sunday we have the Final against Sampdoria. The fact we are already up there challenging with two rounds to go shows how strong we are this season.
"The city is dreaming and to keep them dreaming we need to stay on our toes for at least another week."