Yes, the first defeat must be taken seriously by Napoli. Serie A's journey is still quite long and the threat to the Partenopei is increasingly evident. In my opinion, the defeat to Inter Milan was the impact of the World Cup break so that the cohesiveness that had been formed earlier became chaotic and the proof was that in the trial match Napoli were also unable to show a satisfactory performance. Spalletti certainly has to reflect on his experience, this season is a big opportunity for the Partenopei to win the Scudetto. However, if they lose again against Juventus the following week, then it is very clear that the Napoli players do not have the mentality of being a true champion.
Spalletti must maintain the condition of his players to stay fit, because Napoli is still active in the Champions League. Player injuries are very detrimental to Napoli because they can prevent them from winning the Scudetto at the end of the season.