the quality of the Napoli squad is very evenly distributed in every line and if they are able to maintain their form I think losing one or two players due to injury will not have a big impact on their performance. with what they got until week 14 makes them more confident, this way it is very likely that they will be able to get the Scudetto this season.
with the inconsistency of other Serie A teams, it is a big advantage for Napoli to continue to keep the points apart on the table, if other strong teams are consistent, it is very likely that Napoli will move further away and of course on the weekends of the season it will be very difficult to chased.
This week Napoli will face Udinese at home and I don't think Napoli will lose, because Udinese are not so strong and consistent in Serie A this season so Napoli will continue to put some distance from their rivals this season in Serie A. And I think there will be no way to stop Napoli's splendid performance unless there is a team in Serie A that can beat Napoli in every game this season.