It seems like that napoli has been losing twotimes on the friendly matches which were not good at all. The fact that if napoli may even lose some key players and i think that's gonna be a very problem for napoli. Will inter beat napoli easily?
If Napoli lose the match against Inter Milan, of course they will lose points and make the clubs below them like Juventus and Acmilan able to reduce the points gap in the standings this season, maybe it's a friendly match that is not too serious for them to face but with a losing score like that as if it looks like Napoli is easy to beat 
Bookmakers consider Inter to be the favorite (in my opinion, unreasonably), but even if on paper, for some parameters, Napoli may be weaker than Inter, I dont understand why the tasks of the teams for the game are not taken into account. Inter only needs a win - even a draw will be a continuation of the fall into the middle of the standings. For Napoli, a draw would be quite normal. with such initial positions, it seems to me that Napoli has an undeniable advantage in the game.