Juventus continued their seemingly unstoppable march towards an eighth consecutive Serie A title by thrashing Fiorentina 3-0 at the weekend.
Goals by Rodrigo Bentancur, Giorgio Chiellini and Cristiano Ronaldo put the Turin giants on 40 points from 14 games.
Inter, second with 29 points, battled out a thrilling 2-2 draw at AS Roma, with the hosts furious about a big shout for a penalty being turned down.
Napoli, who also have 29 points, visit Atalanta later on Monday.
AC Milan came from behind to beat Parma 2-1 and climb to fourth place with 25 points.
They leapfrogged Lazio, who were held 1-1 at bottom side Chievo.