Juventus saw their lead at the top of Serie A cut to four points after they were held to a 1-1 draw at Crotone and Napoli came from behind to beat Udinese 4-2.
Juventus bounced back from their European exit by extending their lead atop Serie A to six points.
Cagliari eased their Serie A relegation fears courtesy of Luca Ceppitelli's late winner against free-falling Udinese.
Amadou Diawara left it late to fire Napoli to a nervy 2-1 victory over Chievo that keeps their Serie A title hopes alive.
Juventus warmed up for their Champions League clash with Real Madrid with a 3-1 victory over AC Milan.
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Hellas claimed the spoils in the Verona derby with a 1-0 win over Chievo to move to within a point of Serie A safety.
Juventus were denied the opportunity to move above Serie A leaders Napoli on Sunday as their home clash with Atalanta was postponed.
Roma gave themselves a boost in the battle for Serie A's European places by winning 2-0 at Udinese on Saturday.
Yann Karamoh's first goal for Inter Milan settled their fraught 2-1 victory over nine-man Bologna at the San Siro on Sunday.
Gonzalo Higuain scored a hat-trick as Juventus thrashed Sassuolo 7-0 to keep the pressure on Napoli in the Serie A title battle.
Juventus climbed back to the Serie A summit but made heavy weather of beating a Chievo side reduced to nine men.
Napoli moved four points clear at the Serie A summit on Sunday with a 1-0 victory over Atalanta in Bergamo.
Giovanni Simeone scored an injury-time equaliser as Fiorentina fought back to draw 1-1 against Inter Milan at the Stadio Franchi.
Roma's bid to break into Serie A's top three was thwarted in part by two video assistant referee decisions as they drew 1-1 against Sassuolo.
Gennaro Gattuso recorded his first win as AC Milan head coach with a 2-1 Serie A victory at home to Bologna.
Ivan Perisic scored a hat-trick as Inter moved top of the table with a 5-0 win over Chievo.
Mauro Icardi scored twice as Inter Milan moved to the top of Serie A with a hard-fought 3-1 victory against a resurgent Cagliari.
Massimiliano Allegri's decision to rest two key players backfired as Juventus lost 3-2 at Sampdoria.
Second-half goals from Gonzalo Higuain and Juan Cuadrado meant Juventus came from behind to inflict a 12th straight Serie A defeat on struggling Benevento.
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