Napoli moved four points clear at the Serie A summit on Sunday with a 1-0 victory over Atalanta in Bergamo.
Dries Mertens settled the early kick-off after 65 minutes, accepting Jose Callejon’s through ball to fire home an angled drive for his 14th goal of the season and earn the Partenopei a measure of revenge for their Coppa Italia defeat to the Nerazzurri earlier this month.
The goal marked the end of a 910-minute drought for Belgium forward Mertens.
Sergej Milinkovic-Savic netted twice, after Luis Alberto’s opener had been cancelled out by Manuel Pucciarelli, with Bastos’ deflected strike and Nani’s neat finish completing the rout.
Chievo were awarded a penalty in first-half stoppage time, but the decision was overturned following consultation with the Video Assistant Referee.
The only downside for the capital club was the loss of Italy striker Ciro Immobile, who limped off injured in the first half.
Inter later drew level on points with Lazio as they earned a 1-1 draw against Roma.
Stephan El Shaarawy put Roma in front in the 31st minute at the San Siro, but Matias Vecino rescued a point four minutes from time.
Fabio Quagliarella hit a hat-trick in Sampdoria’s 3-1 victory over fellow European hopefuls Fiorentina at the Stadio Luigi Ferraris.
Carlos Sanchez pulled a goal back for La Viola with a header 10 minutes from time, but it was scant consolation.
The win consolidated sixth spot for Samp, moving them five points better off than their guests.
Nicola Barella put the hosts ahead in just the eighth-minute but Kessie’s two-goal salvo levelled before the break, the first coming from the spot.
Both sides finished with 10 men as Ricardo Rodriguez and Barella both saw red in the final 10 minutes.
Mattia Destro, Sebastian De Maio and Blerim Dzemaili scored as Bologna cruised to a 3-0 success against rock-bottom Benevento.
Crotone ran out 3-0 winners at 10-man Hellas Verona in a battle between two teams in the bottom three at the start of play.
The games between Sassuolo and Torino, and Udinese and SPAL 2013, ended 1-1.