Napoli coach Walter Mazzarri is excited going into their Champions League second-leg clash at Chelsea.

Napoli go to Stamford Bridge defending a 3-1 first-leg lead.

"Is it David against Goliath? My players have grown exponentially thanks to playing in competitions like this. Aside from the economic aspects of the two clubs, what counts is the value that a team can bring on to the field. In that sense, we are a European revelation," said Mazzarri.

"We are capable of pegging our opponents back into their own half for a good 40 minutes. I don't know what will happen tomorrow, but we will certainly play our game. We are accustomed to astounding people and matched Diego Maradona's Napoli.

"Just being here is a victory for Naples, so if anything else comes of it, that will be a bonus. We'll therefore try to be relaxed and calm."