AC Milan bolstered their chances of finishing in the Champions League places in Serie A with a 2-0 win at home to relegated Frosinone on Sunday.
Napoli pushed Frosinone towards relegation with a 2-0 away victory as Dries Mertens equalled Diego Maradona's league scoring record.
Inter Milan recorded a 3-1 win away at relegation-battling Frosinone on Sunday to strengthen their grip on third place in Serie A.
Edin Dzeko scored twice, including a stoppage-time winner, to give Roma a precious 3-2 win at Frosinone on Saturday.
Serie A leaders Juventus made light work of Frosinone as they scored twice in the first 20 minutes on the way to a 3-0 win.
AC Milan completed four Serie A games without scoring for the first time since 1984 as they were held 0-0 at next-to-bottom Frosinone.
Two goals from Arkadiusz Milik helped Napoli move six points clear in second place with a 4-0 win over Frosinone in Serie A on Saturday.
Keita Balde scored twice for Inter Milan as they beat Frosinone 3-0 on Saturday to move alongside second-placed Napoli in Serie A.
Cristiano Ronaldo's late goal helped Juventus to maintain their perfect start in Serie A with a hard-fought 2-0 victory away to Frosinone.
Costa Rica international moves to the Serie A side on a permanent transfer for an undisclosed fee, Arsenal said on Friday.
A team-by-team guide to the new Serie A season as Cristiano Ronaldo makes the move to the Italian top flight.
Frosinone beat Palermo 2-0 in the second leg of their playoff final on Saturday to earn promotion back to Serie A after a two-year absence.
Hellas Verona sealed an immediate return to Serie A with a draw on the final day of the Serie B season on Thursday.
An investigation into match-fixing in Italy may be expanded to include fixtures from Serie A, according to a report in La Repubblica on Wednesday.
Unusual betting activity in the city of Frosinone before the Serie A defeat to Napoli has led to an investigation being opened.
"Remarks such as these gratuitously feed suspicion and cast a shadow over Italian football," said Frosinone president Maurizio Stirpe.
Inter Milan kept their slender hopes of securing a Champions League spot alive as they struggled to a 1-0 win at 10-man Frosinone in Serie A.