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.
Roma extended their unbeaten run in Serie A to seven games with a 2-1 victory over Bologna at Stadio Olimpico.
Cristiano Ronaldo had a hand in all three goals as Juventus cruised to a 3-0 win at Sassuolo to take their lead at the top of Serie A into double figures.
Inter Milan players left the field to deafening jeers from their own fans after they lost 1-0 to relegation-threatened Bologna in Serie A on Sunday.
Napoli cut the gap to Serie A leaders Juventus to six points with a 2-1 win at Lazio, albeit they have now played a game more.
Juventus took the first step towards a record fifth consecutive Coppa Italia triumph with a 2-0 win over Bologna on Saturday.
Cristiano Ronaldo scored twice as Juventus sealed a dramatic 2-1 win over Sampdoria.
Cristiano Ronaldo came off the bench to score a late equaliser as 10-man Juventus salvaged a 2-2 draw at Atalanta.
Sassuolo and Fiorentina had to settle for a point each from a thrilling 3-3 draw, while AC Milan and Torino played out a goalless draw.
Napoli lost further ground on Serie A leaders Juventus after they could only manage a goalless draw at home to bottom club Chievo.
Inter Milan suffered their heaviest defeat of the season by losing 4-1 to Atalanta in Bergamo, days after drawing with Barcelona.
Dries Mertens came off the bench to score a last-gasp equaliser as Napoli drew 1-1 at Roma in Serie A on Sunday.
Lazio left it late but picked up their seventh win in nine league games with a 2-0 victory at Parma.
Roma registered a third straight league win and fourth in all competitions with a 2-0 victory at Empoli in Serie A on Saturday.
Fiorentina shrugged off their midweek defeat to Inter Milan and reclaim third place in Serie A with a 2-0 win over Atalanta.