Napoli coach Walter Mazzarri feels they need a perfect performance against Champions League opponents Manchester City.

Napoli will host the Premiership giants at the San Paolo in a game that they really need to win to put themselves in a position to qualify for the last 16 of the Champions League.

"We need to start again from our second half performance against Lazio," said Mazzarri after the 0-0 draw on Saturday.

"We want to put in a great performance in the knowledge that we'll need to be perfect. We'll take to the pitch with that in mind.

"Manchester City are going through a golden moment, but we know what we have to do and we can cause them harm.

"There will be no calculations - we just want to win."