Mazzarri believes it will be a blockbuster.
"Based on what the two teams have shown so far, it will be a great game, a good show," he said.
"Inter and Roma are two sides that have so far created a lot and given away very little, and they've done even better than us. It will be a great game, an attractive one.
"Exams are never over for me. It's a test for us to become even more competitive. It's a interesting point that, after tomorrow, we'll be the team who's played the most matches against the top sides so far.
"Winning tomorrow would certainly give even more belief in what we're doing. Inter are playing great football, just like Roma, and it's no coincidence they've won six matches.
"At this moment in time Inter and Roma are the two teams that are playing the best football."
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