For next week, Napoli will face another big team. This is like a disaster that keeps happening to Napoli in a row. After losing to Ral Madrid, then Inter, and then having to play Juventus next week. This will definitely have an impact on their mentality. And this will be a very big challenge for Mazarri.
I agree that Juventus is likely to beat Napoli because they will play at home and they are in a good performance this season. It is very different with Napoli which looks very unstable although they already signed a new coach. In the last match, Inter Milan defeated them with 3 goals, it clearly showed that Napoli isn't in a good condition. Since Juventus strength is almost similar with Inter, they are also possible to beat Napoli with 2 goals at least. I don't see a chance for Napoli to get points in Juventus home. It probably will be the next defeat for them.