Juventus fell to a surprise 3-2 defeat at Sampdoria, who maintained their perfect Serie A home record on Sunday.
Napoli moved four points above Juventus at the top of Serie A after they recorded a 2-1 victory against AC Milan on Saturday night.
Roma scored twice in four minutes early in the second half to beat Lazio 2-1 in the most high-profile derby between the capital clubs in years.
Goals either side of half-time from Alessio Romagnoli and Suso gave AC Milan a 2-0 victory at Sassuolo on Sunday night.
Roma enjoyed a 12th consecutive Serie A away victory in this six-goal thriller with Fiorentina, including a brace from Gerson.
Napoli kept a clean sheet despite missing Pepe Reina, but were unable to break down an organised and rugged Chievo.
Inter Milan missed the chance to return to the top of Serie A after being held to a 1-1 draw by Torino.
Juventus survived a scare as they came from behind to beat Serie A's bottom club Benevento 2-1 at home.
Gaston Ramirez and Fabio Quagliarella fired Sampdoria to a 2-0 Serie A win at Genoa in the Derby della Lanterna.
Borja Valero's first goal for Inter Milan set the Nerazzurri on a path to reclaiming second place in the Serie A table as Hellas Verona were defeated 2-1 at the Stadio Marc'Antonio Bentegodi.
Napoli reinforced their title credentials as they beat Sassuolo 3-1 to go three points clear at the top of the table on Sunday.
A sensational Stephan El Shaarawy volley proved the difference as Roma narrowly beat Bologna 1-0 in an entertaining match.
Gonzalo Higuain fired a brilliant double as Juventus won 2-0 at AC Milan to draw level on points with Napoli at the top of Serie A.
AC Milan ended a run of four Serie A games without victory as they beat Chievo 4-1.
Juventus kept up their pursuit of Inter Milan and Napoli at the top of Serie A with a 4-1 win against Spal.
Inter Milan went top of Serie A after holding on for a 3-2 win against Sampdoria at the San Siro.
Ten-man Juventus bounced back from last week's defeat to Lazio with a 6-2 pounding of Udinese at the Dacia Arena.
Leonardo Bonucci's latest lapse in concentration may end up costing Vincenzo Montella his job at big-spending AC Milan.
Napoli saw their 100 percent start to the Serie A season ended as they were held to a 0-0 draw by second-placed Inter Milan at the Stadio San Paolo.
Mauro Icardi plundered a hat trick to pile the pressure on AC Milan boss Vincenzo Montella as Inter Milan came out on top in a thrilling Derby della Madonnina.
Lorenzo InsigneвЂ™s early strike proved enough, as Roma hit the woodwork twice, but Napoli conquered the Olimpico for an eighth straight win.
Ciro Immobile scored twice in a 2-1 Lazio victory in Turin as Paulo Dybala failed to save Juventus from suffering their first home defeat in Serie A in more than two years.
Juventus let slip a two-goal lead, while Paulo Dybala also had a late penalty saved in a 2-2 draw with Atalanta.
Serie A title hopefuls Roma struck a blow to AC Milan's own plans to recapture past glories by beating the new-look Rossoneri 2-0 at San Siro on Sunday.
Marcelo Brozovic scored two goals in the space of three minutes to secure Inter Milan a 2-1 victory over Benevento.
Napoli extended their Serie A record this season to seven straight wins with a comfortable 3-0 victory over Cagliari.
Duvan Zapata won a family battle as he inspired Sampdoria to a 2-0 victory over AC Milan.
Juventus kept pace with Napoli at the top of Serie A with a thumping 4-0 win against 10-man derby rivals Torino.
Faouzi Ghoulam fired a late winner as Napoli maintained their 100 percent start to the season with a 3-2 victory at SPAL.
Stephan El Shaarawy scored twice as Roma continued their fine form with a 3-1 win against Udinese in Serie A.
Argentina forward Gonzalo Higuain scored his first goal for AC Milan to earn them a 1-1 draw at Cagliari.
Cristiano Ronaldo scored his first goals for Juventus as they beat Sassuolo 2-1 to continue their perfect start to the Serie A season.
Napoli exorcised some of the ghosts of last season by beating Fiorentina 1-0 in Serie A action on Saturday.
Just three years after going bankrupt, Parma returned to winning ways in Serie A with a surprise 1-0 win over Inter Milan at San Siro.
Serie A title hopefuls Napoli were thumped 3-0 at Sampdoria on Sunday after coach Carlo Ancelotti tinkered with the team, dropping captain Marek Hamsik and forward Jose Callejon.
Cristiano Ronaldo was left waiting for his first Juventus goal after drawing another blank as the titleholders won 2-1 at Parma in Serie A on Saturday to maintain their 100 percent record.
Radja Nainggolan scored on his delayed Inter Milan debut to set them on the way to their first win of the season on Saturday as they beat Bologna 3-0 away in Serie A.
A late stoppage-time goal by substitute Patrick Cutrone gave AC Milan a 2-1 home win over Roma in an electrifying Serie A clash on Friday and eased the pressure on manager Gennaro Gattuso.
Inter seemed to be in absolute control, but fumbled a 2-0 lead and risked losing the game against a plucky Torino.
Dries Mertens came off the bench to grab the winner as Napoli rallied from 2-0 down to beat visiting AC Milan 3-2 and seize a second victory in two matches.
Cristiano Ronaldo missed an open goal but inadvertently provided an assist for Mario Mandzukic to score as titleholders Juventus beat Lazio 2-0 in Serie A on Saturday.
Inter Milan's hopes of challenging for the Serie A title got off on the wrong foot with a shock 1-0 defeat at Sassuolo on Sunday.
Roma striker Edin Dzeko scored with a memorable volleyed goal following a mazy run by debutant Justin Kluivert to give his side a 1-0 win at Torino in their opening Serie A game on Sunday.
Ciro Immobile scored a magnificent opener, but Arkadiusz Milik and Lorenzo Insigne completed the Napoli comeback to conquer Lazio.
Federico Bernardeschi scored in stoppage time to make Cristiano Ronaldo a winner on his Juventus debut as the Italian champions rallied to win 3-2 at Chievo Verona on Saturday.
Keita Balde completed his move from Monaco to Inter Milan on Monday after just one season at the Ligue 1 club.
Gonzalo Higuain has left Juventus and joined AC Milan in a deal that also sees Leonardo Bonucci return to Juve after a year away in a swap for fellow centre-back Mattia Caldara.
Cristiano Ronaldo is leaving Real Madrid to sign with Italian champions Juventus, both clubs announced on Tuesday.
AC Milan have been excluded from playing in the Europa League next season after breaching UEFA's financial fair play (FFP) regulations, pending an appeal.
Juventus have completed the signing of Portugal full-back Joao Cancelo from Valencia for a fee of €40.4 million, which will be paid in three installments.
Radja Nainggolan has completed his move from Roma to Inter Milan in a deal worth €38 million with Davide Santon and Nicolo Zaniolo moving in the opposite direction as part of the transfer.
Emre Can has joined Serie A champions Juventus from Liverpool on a four-year contract.
Juventus have confirmed the permanent signing of Bayern Munich winger Douglas Costa for a fee of €40 million.
Carlo Ancelotti has signed a three-year contract to replace Maurizio Sarri as Napoli's head coach.
Inter Milan came from behind to snatch the final Champions League place in their 3-2 winner-takes-all victory at Lazio.
AC Milan qualified for the Europa League group stage on the final day in Serie A, following a 5-1 win over Fiorentina.
Gianluigi Buffon said an emotional farewell to Juventus as the veteran goalkeeper marked his 640th and last Serie A appearance in a 2-1 victory over relegated Hellas Verona.
Juventus clinched a seventh straight Serie A title to continue their dominance in Italy despite labouring to a 0-0 draw at 10-man Roma.
Lazio missed a chance to clinch the fourth and final Italian place in next season's Champions League group stage when they were held to a 2-2 draw at relegation-threatened Crotone on Sunday.
Inter Milan's Champions League hopes suffered a huge blow as Sassuolo shocked them again at the San Siro in Serie A on Saturday.