Walter Mazzarri has warned Napoli “cannot afford similar defensive errors against Chelsea” after an epic 6-3 win over Cagliari.
The Partenopei are preparing for their Champions League trip to Stamford Bridge on Wednesday, having won the first leg 3-1.
“I am happy with the way we stepped on to the field, as we were facing a motivated team,” said Mazzarri.
“I got angry because, even if the result was safe, we shouldn’t have conceded the last two goals. We cannot relax even for a second, because that way we concede. We’ve got to reflect on that.
“I am not worried about Chelsea, but the fact is we cannot afford similar defensive errors against Chelsea. I’m really working on the psychological aspect, which we saw with Milan was an issue against Arsenal.
“We must not start out timid, we must not think about our advantage, but instead immediately play the way we know how.
“Chelsea will have to look for a goal, so I expect them to go on the attack. We must focus exclusively on playing our game and trying to score in London without being defensive.”
Ezequiel Lavezzi is on stunning form and has scored for the last five consecutive games.
“I hope his moment can continue. All he was lacking before was to be sharp and focused in front of goal. He converted the penalty well tonight and could’ve scored another, so his growth is enormously satisfying.”
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