Napoli president Aurelio de Laurentiis insists they will bounce back.
De Laurentiis said: "During the course of the season, there are times when things are good and times when they is less good.
"I remain convinced that we have a great team and I continue to have confidence in our talents. For this reason I support our group and our Coach, both of which are great.
"We must move forward with confidence in our resources because this is a minor drop that can improve."