Napoli head coach Walter Mazzarri warned his side cannot afford any more slip-ups as they look to kick-start their campaign against Monza.

The Partenopei return to action after the Christmas break looking to avoid a third straight Serie A defeat with a lengthy injury list.

Brazilian defender Natan is the latest player facing a spell out because of a dislocated shoulder while midfielder Stanislav Lobotka has a cracked rib.

Forwards Victor Osimhen and Matteo Politano are also both missing through suspension following their dismissals in the defeat at Roma.

Mazzarri, though, maintains the squad will just have to cope as best they can as the defending champions aim to close on the top four.

“It’s a huge game against Monza. We need to play with attacking impetus and also strike the right balance,” Mazzarri told a press conference.

“We can’t have any more slip-ups. We need to get back to our brilliant selves and restore our confidence levels.”

Mazzarri, who returned for a second spell at Napoli in November, added: “We have deserved two or three more points from my first cycle back in charge based on how we have performed and how we have played on the front foot.

“That is my only regret, but I’m here to help the lads out and I’m confident we can improve.

“When we’re playing well, we usually impose our game on everyone. We’re also improving defensively.

“Unfortunately, we’ve paid for some mistakes which have led to us dropping points. The aim is to have attacking threat while striking the right balance and remaining solid.”

Mazzarri feels Napoli are not far away from turning promising performances into positive results.

“I can see that mentally this team has fire on the inside and is acquiring the sort of spirit that I like. We need to channel that energy in a positive way,” he said.

“I am sure that as soon as a few things go our way, we will see a Napoli side that never gives up and shows what we are capable of – that is what will show we are on the right path.”

Monza coach Raffaele Palladino feels his side must be “hungry” to get themselves back on track following their own run of three defeats from the past four games.

“We want to put in a great performance,” said Palladino, who returns to his hometown club. “We face the Italian champions who have great players.

“I saw a good week (of training). We worked well and we want to score points. We have to start doing well again. I want a team hungry for results.”