Cristiano Ronaldo's 600th goal in all club competitions earned Serie A champions Juventus a 1-1 draw against Inter Milan.
Napoli delayed Juventus' coronation as Serie A champions for another week at least as a goal in each half from Kalidou Koulibaly helped them to a 3-1 win at Chievo.
Chievo stand on the brink of relegation from Serie A following a 3-0 defeat at Bologna, who lifted themselves out of the bottom three.
Napoli thrashed Claudio Ranieri's Roma 4-1 at the Stadio Olimpico on Sunday, with Arkadiusz Milik and Dries Mertens among the scorers.
Claudio Ranieri's Roma suffered a blow to their Serie A top-four hopes as they went down to a surprise 2-1 defeat at struggling SPAL on Saturday.
Napoli needed a late goal from Lorenzo Insigne to prevent Carlo Ancelotti's side from suffering back-to-back Serie A defeats after they salvaged a 1-1 draw at Sassuolo.
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