AC Milan brought in high-profile players in the offseason, but it is a youth academy graduate who is proving the difference.
Mauro Icardi scored twice as Inter Milan came from behind to win 3-1 at Roma.
Paulo Dybala scored a hat trick as Juventus fought back from two goals down to beat Genoa 4-2.
Academy product Patrick Cutrone was the standout performer in an AC Milan team chock-full of expensive summer signings as his goal and assist helped the ambitious Rossoneri thrash 10-man Crotone 3-0 in Serie A on Sunday night.
Napoli coasted to a 3-1 opening-weekend win at Hellas Verona, hitting their Serie A stride with precious little fuss or trouble on the road.
Juventus launched their bid for a seventh successive Serie A title with a routine 3-0 home win over Cagliari.
Ciro Immobile scored twice as Lazio cast some early doubt on Juventus' ability to sustain their domination of Italian football by claiming a 3-2 victory in the Supercoppa Italiana in Rome.
Juventus have signed young Italy winger Federico Bernardeschi from Fiorentina in a €40 million deal.
Juventus have completed the signing of Mattia De Sciglio from AC Milan for в‚¬12 million, potentially rising to в‚¬12.5m.
AC Milan have completed the signing of Italy defender Leonardo Bonucci from Juventus for в‚¬42 million.
Juventus have completed the signing of Wojciech Szczesny from Arsenal for a fee of в‚¬12.2 million.
AC Milan have extended the contract of goalkeeper Gianluigi Donnarumma until 2021, weeks after the 18-year-old turned down their offer of a new deal.
Douglas Costa arrived in Turin on Tuesday night ahead of his expected move to Juventus from Bayern Munich.
AC Milan have completed the signing of Turkey midfielder Hakan Calhanoglu from Bayer Leverkusen.
Gianluigi Donnarumma has informed AC Milan that he will not be extending his contract with the Serie A club, opening up the prospect of a transfer this summer.
Roma hired Sassuolo manager Eusebio Di Francesco on Monday as their new head coach, replacing Luciano Spalletti, who took over Inter.
AC Milan made Andre Silva their fourth summer signing on Monday, acquiring the Portugal striker in a €38 million deal with Porto.
Inter Milan have confirmed the appointment of Luciano Spalletti as their new coach on a two-year contract.
Massimiliano Allegri has signed an extension to his contract as Juventus coach, tying him down to the club until 2020.
Roma have confirmed the departure of head coach Luciano Spalletti after he guided them to a second-place finish behind Juventus in Serie A this season, amid reports he is set to take over at Inter Milan.
Roma legend Francesco Totti admitted he was "afraid" of what comes next as he bid a warm farewell to the only club of his career on Sunday.
Francesco Totti called time on his 24-year career as a Roma player with a well-timed substitute appearance that inspired the Giallorossi to beat Genoa 3-2.
Ten-man AC Milan lost 2-1 at Cagliari in their last game of the Serie on Sunday after conceding a stoppage-time goal.
Seventeen-year-old Moise Kean came off the bench to become the first player born in 2000 to score in Serie A by grabbing a last-gasp winner for champions Juventus at Bologna.
Juventus have become the first club to win the Serie A title six years in a row by beating Crotone 3-0.
Roma closed the gap to Serie A leaders Juventus to a point after a thrilling 5-3 win at Chievo.
Napoli still have an outside chance of claiming the Serie A title, however slim, after a 4-1 win over Fiorentina.
Goals from Dani Alves and Leonardo Bonucci secured Juventus their first trophy of a potential Treble haul as Lazio were defeated 2-0 in the Coppa Italia final in Rome.
Roma put a dent in the title charge of Serie A leaders Juventus as they came from behind to win 3-1 at the Stadio Olimpico and keep alive their own outside hopes of lifting the Scudetto.
Managerless Inter Milan's woes deepened on Sunday in a 2-1 loss to Sassuolo at the San Siro.
Reigning champions Juventus stormed back into second place in the Serie A table, while AC Milan's imploding season took another turn for the worse.
AC Milan's imploding season took another turn for the worse as Gennaro Gattuso's 10 men were thrashed 3-0 at Hellas Verona.
Napoli took full advantage of Inter Milan's first defeat of the Serie A season to take over at the top.
Udinese ended Inter Milan's unbeaten start to the Serie A season and led them to surrender the top spot after winning 3-1 at San Siro.
AC Milan recorded their first league win since Nov. 5 and their first under new coach Gennaro Gattuso as they beat Bologna 2-1.
Roma were unable to find a way past an inspired Stefano Sorrentino as they were held to a goalless draw at Chievo.
Inter Milan remain in top spot in Serie A after holding Juventus to a goalless draw in Turin.
Inter Milan moved a point clear at the top of Serie A as an Ivan Perisic hat trick helped them to a 5-0 victory over Chievo.
Benevento goalkeeper Alberto Brignoli scored with a diving header five minutes into injury time to seal his side's first Serie A point in a 2-2 draw with AC Milan on Sunday.
Serie A leaders Napoli surrendered their unbeaten start to the season as Juventus striker Gonzalo Higuain returned to haunt his former club with the only goal in a 1-0 win.
Edin Dzeko ended his goal drought with the opener as Roma beat 10-man SPAL 3-1 on Friday evening.
Second-half goals from Mario Mandzukic, Mattia De Sciglio and Medhi Benatia saw reigning champions Juventus recover from their setback at Sampdoria last weekend with a 3-0 win over Crotone in Serie A on Sunday.
Roma moved fourth and ahead of rivals Lazio thanks to a 1-1 draw at Genoa.
Napoli returned to the top of Serie A following a narrow 1-0 win at Udinese.
AC Milan's miserable Serie A run continued as Torino held them to a 0-0 draw at San Siro.
Inter Milan moved to the top of the Serie A table with a hard-fought 3-1 victory against a resurgent Cagliari on Saturday night.
Mauro Icardi scored two headers to fuel Inter Milan, who jumped Juventus for second place with a 2-0 win over Atalanta.
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.