Rafael Benitez has told his Napoli players that they must work hard for each other if they are to beat Borussia Dortmund on Tuesday.
The Naples outfit can advance to the knockout stages of the Champions League with a win at the Westfalenstadion, providing that Arsenal avoid defeat against Marseille in Group F's other match.
"Everyone has to be there, every position," Benitez told reporters. "I expect the midfielders to help out the defence and when we are in possession our defence has to support our attacks. I expect a cohesive team effort.
"We did well in three of our four games so far, right from the kickoff. Only at Arsenal did things not go the way we would have liked. The team is still developing [and] even with a defeat or a draw we would still have the chance to continue in two weeks' time.
"Both teams have injuries and we believe that Dortmund will come out and attack. We will have to focus on finding ways to defend and at the same time hurt them with our attacks."
The match gets underway in Dortmund at 7.45pm.
