Walter Mazzarri complimented Fiorentina and warned Napoli have to sort out their “shocking” pitch.
The Partenopei earned a 2-1 victory, but the playing field at the Stadio San Paolo looked more like a beach than turf.
“The pitch was shocking, especially for Serie A. We have to do something about this and I don’t know whose responsibility it is.
“Not only was it ugly, but it was also dangerous for the players who could hurt themselves on that surface. I hope someone will work to make the field suitable for the top flight.
“As for the game, I want to compliment Fiorentina, as they started stronger and we were a little held back in the beginning. They were better in the first half, holding possession and deserved more.
“I did not like our performance, mainly thanks to the efforts of Fiorentina, who can be a real surprise this season.
“In the second half Gokhan Inler was very sharp and gave our play more organisation. We deserved to win for the way we played after the break, but I think today we only played for 45 minutes.
“In fact, I didn’t like the end of the match either, as we went too deep.”