Napoli president Aurelio de Laurentiis insists back-to-back Scudetti was never realistic.
Napoli's failed title defence this season has seen two changes of coaches.
ADL said last night to TMW: "These are moments that remain imprinted in the heart and mind, in the ardor of always wanting to achieve something which in any case in this city is not so easy obtain.
"It's clear that there is a sense of revenge, there is a sense of total satisfaction. If there is more anger about the current season? Let's leave the current season alone. Anyone who believes that we can win two championships in a row is deluded.
"Learn from Manchester United."
