Mazzarri is upset with the way they've been ignored this season.
"I heard some comments that acted as if we didn't exist between Milan and second place, but now they are complimenting us, so I guess they changed their version. Milan changed a great deal this season and brought down the age of the squad, still maintaining good results.
"I watched the last game we played with Milan and we could've gone 3-0 up. We made life difficult for ourselves," he said of the 2-2 draw.
"Every now and then it would do us good to win while playing badly. Looking at the performances, we usually deserve more than we actually end up with. It doesn't hurt to win playing badly.
"This is an important test of our maturity and Milan-Napoli has always been a fascinating fixture, so we enjoy playing it. We are in good shape and have a great chance of victory. I hope the players won't feel nervous or too reverential towards Milan."