Napoli have fallen far behind so it will probably not be possible for them to get back into a good position again this time. The way Inter are playing makes it much easier for them to become champions. Inter are ahead of the other teams on points, so it will be very challenging for the other teams to overtake them. Napoli didn't focus on their performance early on which is why they are in the situation they are now. So I can't consider Napoli as likely to do anything good ever
Since Napoli won the Italian championship the previous season, they have found it extremely difficult to concentrate on their league play. As a result, they have begun to slip down the league standings, currently they are in fifth place. Roma, on the other hand, is in fourth place, but since Bologna defeated them, they have dropped to 7th place i know Roma will lose the point. Fiorentina is behind Napoli due to the fact that Napoli advantage of having more goals than them. If Napoli doesn't take this position from Inter Milan, I don't think they will even compete with inter right now, because Inter wants to win the championship this season.
Napoli against Cagliari, some were doubting of Napoli's performance before the game because they aren't performing well right now. However, I did think Napoli would win because they need three points to go to the top of the league, and it will be difficult challenging for them to do so right now because Juventus and Inter Milan are competing to become the championship this season.