After the Nerazzurri lost in the Champions League midweek to Greek club Panathinaikos, Montervino can see cracks in the foundation.
"We need to be calm," Montervino told Datasport.
"Inter are a great team, but we aren't scared of them.
"We know how good we are and we play every match with the belief that we can win - nothing is impossible.
"Every game is important and we want to prove that we can finish the campaign in the top six.
"As a team we have been getting excellent results. I'm sure we can finish around the top this term and a win over Inter would be a great step towards that."