The result sees Lazio sitting in third place.
Sarri said, “We never hid, nor stood up, we just said that we would do the maximum of our abilities and see what happens. I already expressed my opinion that there are on paper other teams better equipped, but we still take it one game at a time and see what comes of it.
“We did a favour for ourselves more than anything, as last season Milan caused us huge problems in all three games and we always lost, so this was a sign of how much Lazio have grown.
"If Napoli are doing well, it can only make me happy."