This weekend Napoli will have another chance to gain some further advantage on Inter and Juventus. They're playing an away match against Empoli, currently ranked 10th, which might not be an easy game, given Empoli lost only once this season and conceded a total of only 4 goals in 7 games, but it still should be an easier game than Inter facing Roma and Juventus playing against Lazio.
There's a fair chance we'll see a goalless draw in Empoli Vs Napoli, odds for that are x8.5. Worth considering throwing a few pennies on that.