Napoli coach Walter Mazzarri admits their Champions League with Barcelona is as tough as it gets.
Napoli will meet Barca in the round of 16 after today's draw.
Mazzarri reacted, saying: "I said after the match against Cagliari that all the teams that qualified for the round of 16 are strong and therefore any pairing would have been difficult.
"This one against Barcelona in particular. For Napoli it will be a fascinating challenge."
Meanwhile, Sky Italia's Paolo Condo said: "Good game, not impossible. It's the Maradona derby, Juliano bought it from Barcelona. We are not talking about impossible challenges for Napoli and Inter, compared to Lazio against Bayern, but they will still be tough."