Napoli coach Rafa Benitez was baffled as to how the referee waved play on when Atalanta took the lead in last night's 1-1 draw.
Defender Henrique looked to be fouled by Atalanta striker Mauricio Pinilla when the visitors took a 72nd minute lead at the Stadio San Paolo but referee Gianpaolo Calvarese opted not to intervene.
Duvan Zapata restored parity in the dying minutes of the game but the Spaniard was more concerned about the referee's decision at the end of the game.
"Maybe six referees are not enough and eight are required, else I cannot explain certain decisions," Benitez said.
"We created eight goal-scoring opportunities then they scored and I cannot explain how it wasn't a foul. Clearly, I repeat, six referees found it difficult to see it.
"As for the game, there's not much to say, we failed to win, there are ten games left but I won't talk about our position in the table.
"I just ask again how the referee, the linesmen, the fourth official and the referee behind the goal failed to see the foul on Henrique.
"[My red card?] I've never been shown a yellow card in my coaching career so I cannot understand the red for a misunderstanding.
"If after 600 games I don't get a yellow card it means that if I get a red there must be a valid reason. In the end this game was badly affected by an event that has nothing to do with the game."