Napoli have had a mixed run lately, winning some and losing some, so they're not in perfect form but they're still picking up results. Juventus have been struggling more, with recent losses and draws, so they come into this one looking less steady. When these two have met recently, Juventus have usually come out on top, and several of those games had a fair number of goals.

This looks like a close match, but given Juventus's recent trouble and Napoli's slightly better results, Napoli seem more likely to edge it. A draw is also possible since neither team is in great shape, but if I had to pick, I'd lean toward a Napoli win.