Napoli coach Rafa Benitez admits they lacked self-belief in their Champions League defeat to Arsenal.
Napoli lost Gonzalo Higuain to a last-minute fitness test in their 2-0 defeat at the Emirates, conceding twice in the opening 15 minutes.
"We started very badly, they scored two goals and everything changed," Benitez told Sky Sport Italia.
"We lost our confidence, the second half was a bit better, but it's tough to come back from 2-0 against Arsenal in the Champions League.
"Clearly when you buy a player of Higuain's level, you cannot have another on his level. We tried a few other things, tried to play ball to feet, but we didn't have much chance to test it out because there wasn't any space.
"I don't think there are two different Napolis. Higuain is an important player and clearly with him on the field we play differently, but we won at Genoa with Goran Pandev.
"It was a possibility to lose here. Now we have to concentrate on the next game."
