Napoli coach Rafa Benitez offered no excuses after their shock 3-0 defeat to Atalanta.
There were howlers from Pepe Reina, Gokhan Inler and Federico Fernandez in Bergamo, meaning the Partenopei have earned only two points from the last three rounds.
"We had to play with sharpness and quality to win. We had three or four promising counters in the first half, then started the second with a mistake. We had a chance, then a mistake, then another chance and another error," he told Sky Sport Italia.
"Of course it becomes very difficult to get back into a game after making so many mistakes. I don't think these errors have happened before, but they completely changed the game.
"If we don't take our chances and the other team does, then of course we are going to lose. There was also a penalty on Dries Mertens.
"It is difficult to find space against teams like Chievo, Bologna and Atalanta, but we must learn to score more goals."
