Napoli boss Walter Mazzarri says they cannot show any weakness if they're to compete for the title.

The Azzurri are currently sitting in second place behind AC Milan on the Serie A table.

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."