The defending Italian champions defeated Catania 1-0 at home on Sunday to increase the gap between themselves and second-placed Napoli.
"We cannot think we have the Scudetto in our hands and manage our strengths from now on, when we try and manage games we always make mistakes and disasters," he told reporters.
"[If we did believe the Scudetto is already won], we would start playing more defensively and that's not our style, that's not what I tell my guys.
"That would go against my principles and do damage if my guys were to start thinking like that."
Napoli lost 2-0 to Chievo in Verona on Sunday.