Juventus have a great chance to catch Napoli, because they have full concentration on Serie-A, while Ac Milan and Napoli are still playing in the Champions League, so their concentration must be divided in the two competencies they face going forward.
Juventus is in crisis currently because they are doing a total overhauling of the executive due to mismanagement. The resultant effect of this is that it will affect the team's performance in the pitch in the long run. To add to this, they have problems on the pitch with bad performance and some players not happy with the manger's tactics. With these they do not even stand a chance to go head-to-head with a more organized Napoli team that is built for the title.