Marek Hamsik expects his Napoli side to cause Chelsea problems on the counter-attack in the Champions League on Wednesday.
The Premiership club will have to go on the offensive given that they lost the first leg of their last 16 tie 3-1 in Naples.
“They’ve won two games in a row and will look to add to that against us,” the 24-year-old commented.
“However, my teammates and I are just thinking about ourselves, we believe in our strength. We can hit them on the counter-attack by exploiting the space that they will leave us.
“The odds are probably in our favour, but it's necessary to keep our composure and let the nerves affect Chelsea. It's 80 per cent in our hands and we must not get caught up in the atmosphere and euphoria.”
Hamsik is also sure that his side won’t make the same mistake that Milan did in their tie with Arsenal. Having won the first leg 4-0, they only just qualified after the Gunners collected a 3-0 victory.
“We saw the Arsenal-Milan match and we have to make sure that does not affect us. If we use the same tactics as Milan it would be a disaster.
“Chelsea have had their problems and we need to exploit their weaknesses and doubts. We need to score and if we can do that then I believe we will go through.
“Chelsea were lucky after the game at the San Paolo. We deserved another goal at least. We're going to Stamford Bridge to enjoy the game and we're confident of getting through.”
Napoli squad: De Sanctis, Rosati, Colombo; Aronica, Britos, Cannavaro, Campagnaro, Fernandez, Grava; Dossena, Dzemaili, Gargano, Hamsik, Inler, Maggio, Zuniga; Cavani, Lavezzi, Pandev, Vargas, Ammendola.