Walter Mazzarri must have been surprised by this result. Because it turns out that his team actually had to suffer a very bad defeat. Napoli controlled more of the ball but they had difficulty creating attacks in the match. And I think Walter Mazzarri made a late decision in the second half. Because he should have introduced the core players more quickly in the second half. But he did it too late because when the main players were put on the field at that time Napoli had already lost several goals. In fact, if Walter Mazzarri could bring on Osimhen and the others at the start of the second half then I don't think Napoli would be lost big like that. This result really disappointed everyone. In fact, I'm sure many people bet on Napoli in that match.
Napoli performance under Walter Mazzari can't consistent on every match after unbelievable result achieving defeated by Frosinone on Copa Italia round of 16. I think fatal mistake with current starting line up from Napoli and Walter Mazzari made many rotation but its not effective yet because they loss over 4-0 from Frosinone in front of their fans. Made several players substitute on second half match not really help for Napoli for scoring goals because conceded two goals when many players change including Victor Osimhen can't contribution well for helping Napoli lead to quarter final of Copa Italia.
Over confidence against Frosinone as team have under lower position than Napoli on Serie A make Walter Mazzari use their second composition and its not worth yet how fighting motivate from Frosinone players success cored four goals.
However, this is Napoli's worst record in the last two seasons. Walter Mazzarri will definitely be embarrassed by this result because he underestimated Frosinone in this match. And I think this is worse than anything Garcia (Napoli's previous coach) has ever done. I don't know if he underestimated his opponent or if he wasn't serious about winning that match. Because one thing that is certain is that Napoli have now lost the opportunity to qualify for the next stage of the Coppa Italia, namely the quarter-finals. And I think this is a big loss for the team.
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To me this is one of those coaching mistakes that I hate a lot. I don't understand why coaches choose to rotate in the worst moments possible and why they would risk losing a game that would get them into the next round of an important competition? If there is supposed to be rotation, I would always start with the best players I have available and I would take the game 100% seriously. Slow down when the lead is safe and there is no risk throwing a game like that way. Now the damage is done and there is no way back.
Yes, I agree that it would be better if Walter Mazzarri played the main players in the first half and could potentially give Napoli a few goals. After that, it was up to Walter Mazzarri to withdraw the first team in the second half and replace them with second-string players gradually if Napoli had a convincing enough lead. I am quite surprised by this result whether Napoli really intends to withdraw from the Coppa Italia competition this season after they struggled from the preliminary round. I do not think so. This is purely a strategic error used by Walter Mazzari.