It was a humiliating defeat for Napoli. But I think in that match Napoli only fielded second-string players and there were several main players. It seems that Napoli is focused on improving their ranking in the League and playing well in the Champions League. However, losing by 4 goals like this is still quite embarrassing. Because if the reason is for the Champions League then the next match schedule is still very long away. Is this bad performance because Napoli don't really care about this match?
Maybe they don't really care about this match because it can be seen from the line-up that Mazzari fielded because there are more important things that must be achieved. After all, in Serie A they will face AS Roma a team that can give Napoli tough resistance later, and lose. 4-0 was their second defeat this season against Frosinone but that's not a problem of course because they are still playing in a more prestigious competition even though the chances are certainly not big, will they be able to repeat what they achieved last season by advancing to the Champions League quarter-finals? This is quite difficult to predict because they got a difficult draw, they will face Barcelona in the round of 16 so everything will be tough for Napoli.