Napoli coach Rafa Benitez was shocked by their 1-0 defeat to Chievo Verona.
Maxi Lopez struck the winner for Chievo, with Napoli also missing a penalty.
"It is difficult to explain this defeat," Benitez told Sky Sport Italia.
"Towards the last 20 minutes we got a little too hasty and wasted opportunities. It's one of those games where if it had ended 3-1, nobody would've complained.
"The fans were fantastic with the team and did what they had to all the way to the end. If we do not score a goal, then we cannot complain.
"We have to make more of our chances and win a game like this."
