And actually they still have a chance to compete for the title if Napoli throw away a lot of points.
I see it's impossible for Inter to catch Napoli, and it's also impossible for Napoli to just throw away this golden opportunity for them to become a scudetto, maybe Napoli can lose or draw in later matches but Inter must continue to win without also wasting points, and also other teams who are competing for the championship must suffer a drop in form which is why I say it is quite difficult for Inter to catch up.
The only silk route that Napoli can take to win the Scudetto by retaining the players that have been formed since the start of the season, their compactness has brought Napoli to the first place in the standings list. Napoli must reject all offers that come to hijack their players, losing players in the main squad will make Napoli appearance unbalanced.
Besides that, the threat from other teams that continue to chase Napoli at the top of the standings must be considered, there is no other way to get away from their competitors other than winning every game. Napoli chance to win the Scudetto is very close, player connections and supported by several classy players in their squad will make it easier for them to win the Scudetto this season.