Napoli started well by winning all four matches in the league, but to be honest, I don't expect anything less from them. Aside from Florentina, the rest opponents they went up against were mid or bottom table clubs and I expected a win. Their real strength will be tested in their upcoming matches. If they can be able to win strong opponents like AC Milan and the likes, then I'm sure they'll do well this season.
Napoli have not tasted defeat in the league yet, although they have not yet faced a threat to them. However, I do not think they need to test their strength after winning the title last season. Napoli are still a very strong team, but we will see how strong they are this season in the next matches. In the next match they will face a strong team AC Milan, but it will be at AC Milan's home ground. In this match we will be able to test Napoli's strength
This is why when it comes to league Conte is one of the coaches that know how to play it, the thing most people takes for granted is what he takes advantages of. When you are playing in a league most people underrate winning bottom half teams but that where winning the league lies.
When you are able to beat all bottom half teams in both league it have a very big advantage, so when you play the big teams that are also contending for the league you just try not to lose, you can play to win or even draw and it fine. This has always been Conte philosophy and it always works for him.
As for me I still consider Napoli favorite in winning this league again this season, they are playing well and also defending well too, so I think when they get result also when they play in the big games.