Walter Mazzarri thinks the one disadvantage Napoli have in the title race is that they always need to be 100 per cent to keep pace with their rivals.
Napoli were hugely impressive again on Saturday when they beat Roma at the Stadio Olimpico for the first time in 18 years to ensure that the team stays in second place in Serie A.
Speaking to Radio Monte Carlo, Mazzarri said: "We must always be 100 per cent to even be able to think about keeping pace with Milan and Inter right until the end.
"Even when the others are not at 100 per cent, they can still get results. We'll see what happens in the end. No one has ever told us that we must finish in a certain position: we also have this advantage on a psychological level."
Asked to reveal the secret behind Napoli's success, Mazzarri replied: "It's team play.
"I believe that our secret is a unity of intent. The team has trained with me for a year and a half now. Certain mechanisms are greaseproof.
"Aside from that, we extract maximum benefit from Edinson Cavani. But it's our play as a team that carries this great player to score all these goals.
"There are no big secrets," he concluded.