Break the transfer window and also the world cup will still have an effect on the team. Even though they are not part of the national team squad that represents their country for world cup. Example the physical and mental health of the players that will change when the league returns. This is something that the teams who are fighting for the championship need to be wary of. Changes in the formation of opposing players from the transfer window can make the opposing team better. So, Napoli must be careful and maintain the physical and mental players in order to continue to appear consistent after this break.
They are professional players, they must know how to keep their mentality and physical health during the league break. I only feel afraid about the transfer window in January, it is a big challenge for Napoli to keep their players. It will be a big problem if some key players decide to move to other clubs because of an offer of big money. I know Napoli can get the replacement, but the new players sometimes need much time to play at their best level. This is very possible to influence the club performance. I am worried that Napoli can't consistently get full points if there is a change in their key players.