Most likely Juventus and AC Milan will wait for the moment from the 4 clubs, expecting all four to experience defeat or make mistakes in several important matches and later it will be utilized by Juventus and AC Milan, but even so the result of the Juventus versus AC Milan match indicates that the match really expects a draw from these two big clubs, even so Atalanta, Inter Milan, Fiorentina and Lazio, are still considered tough but of these 4 clubs the one that stands out is Atalanta compared to other big clubs, because consistently in every match Atalanta, Fiorentina, Lazio always get a good win so that's why Napoli's current competitor is not Inter Milan but these 3 clubs who are likely to win the Serie A title this season.
All the clubs on the second to fourth positions are threat to Napoli and don't also forget that Inter know how to stay strong for so long, and they are always among the title contenders from season to season. I know that Fiorentina and Atalanta are fully in form but it's for them to continue in this great form till the end is what no one knows if it will be possible or not. As for Lazio, I don't see them lasting long on top of the table. This season is not easy for Napoli like last two season that they won the title for the first time.
Napoli are indeed a strong team, they have won Serie A for 2 consecutive seasons and they will not be able to play well this season because they have lost several key players. Inter and Atlanta, these two teams always perform well, being the toughest rivals for Napoli to be at the top of the Serie A standings, Napoli's performance is very much down compared to last season, while the teams below them are all in improving condition, as well as Lazio, they are not showing the best performance but they are improving. correct yourself and to maintain a safe position.