Manager Maurizio Sarri was hung up over a late goal conceded by Napoli in their Champions League victory over Feyenoord.
Goals from Lorenzo Insigne, Dries Mertens, and Jose Callejon saw the Italians emerge as 3-1 victors, but Sarri was most concerned with the 93rd-minute strike from Sofyan Amrabat.
"At this time I am much more annoyed about the goal we conceded," Sarri told Mediaset Premium. "In a competition where goal difference counts, you cannot concede a goal like that 10 seconds from the end. I cannot be satisfied.
"We had a good game, created a lot, but what I don’t like is that we allowed Feyenoord absolutely nothing and yet they scored a goal and had a penalty. Clearly we are doing something very wrong.
"We also should’ve scored more of the goals, considering the chances we had. Feyenoord do suffer under a pressing game, so pouncing on loose balls could’ve been useful. We did it well in parts, not all the way through.
"Dries Mertens, Jose Callejon and Lorenzo Insigne score a lot of goals, but they also help the team out and work to help the defence.
"I am happy with the three points and happy with the overall performance, but conceding a goal like that 10 seconds from the end made me leave the field rather upset…"
With the win, Napoli remain third in Group F having lost their opening match against Shakhtar Donetsk, who occupy second place despite their defeat to group leaders Manchester City.