Carlos Tevez scored the only goal as Juventus beat Catania in a bad tempered affair which saw both coaches sent to the stands.
Antonio Conte's men overcame a spirited performance from the league's bottom club to continue their seemingly unstoppable march to a third consecutive Scudetto.
Their sixth consecutive league win was confirmed thanks to Tevez's angled drive - his 16th of the season - just before the hour mark, which restored Juve's 14-point lead over Roma.
Catania finished the game with 10 men after Gonzalo Bergessio was sent off after 67 minutes for a second yellow for elbowing Giorgio Chiellini.
Both coaches had earlier been sent from the touchline following an incident in which Bergessio avoided a second yellow earlier after appearing to catch Leonardo Bonucci with his arm.
Elsewhere on Sunday, Fiorentina enhanced their outside chance of securing Champions League spot by defeating third-place Napoli 1-0 at Stadio San Paolo.
Joaquin's free header two minutes from time secured the points against Rafa Benitez's side, who played more than half the game with 10 men after Faouzi Ghoulam's straight red card.
The victory ensured the Florence club are now seven points behind Napoli.
Milan avoided a fourth consecutive Serie A defeat by drawing 1-1 at Lazio but remain in the bottom half of Serie A.
They went ahead just before half-time when Kaka's cross was directed in by the unfortunate Anbdoulay Konko, but Lazio hit back through Alvaro Gonzalez's first goal of the season in the second half.
Mario Balotelli almost won it for Clarence Seedorf's side but saw his fierce shot cannon back off a post.
A brace from Giacomo Bonaventura, including a 90th minute winner, gave Atalanta a 2-1 win at Inter.
The 24-year-old put Atalanta ahead after 35 minutes only for Walter Mazzarri's men to equalise instantly through Mauro Icardi.
Inter hit the woodwork three times as they went in search of a winner and were hit with a sucker punch at the death when the unmarked Bonaventura's header condemned the home side to only their second home defeat in Serie A this season.
Parma are level on points with Inter but stay sixth after seeing their three-game winning run ended after a 1-1 draw with Genoa.
The visitors went in front through Isaac Cofie's goal on the break after 21 minutes but the lead only lasted 10 minutes as Ezequiel Schelotto's stunning strike ensure it was honours even.
Elsewhere, Bologna climbed out of the relegation zone after Lazaros Christodoulopoulos bagged a 78th minute penalty to secure a 1-0 win against Cagliari, and Udinese won by the same score against Sassuolo who remain deep in trouble.
Veteran Italian striker Antonio Di Natale made the difference after 26 minutes but missed a penalty 10 minutes later.
The visitors had a penalty of their own with 18 minutes remaining but Sergio Floccari's spot kick struck a post.
Sampdoria made it three wins in four with a 5-0 demolition of Verona. The game was as good as over after three goals in the first 38 minutes from Gianluca Sansone, Renan Fernandes Garcia and Roberto Soriano.
Soriano grabbed his second just after half-time and defender Angelo Palombo rounded off the scoring before the hour mark to give Sinisa Mihajlovic's men their biggest win this season.
|Sounders part ways with foundation coach Schmid|
|Mane turned down Manchester United for Liverpool|
|Zidane on Pogba: Until August 31, anything can happen|
|Mkhitaryan driven by father´s death|
|Inter rejected Napoli offer for Icardi, says president|
|Clichy: City fighting fit after Guardiola pizza ban|
|Everton and Burnley win as Hull are held|
|Ajax held by PAOK after Cillessen howler|
|Conte left frustrated by ´crazy´ money in transfer market|
|Neymar makes Barcelona case to Gabriel Jesus|
|Rostov comeback twice for Champions League draw with Anderlecht.|
|Arsenal defender Mertesacker set for lengthy lay-off|
|Conte not selling ´fantastic´ Matic|
|Ibrahimovic keen on MLS and Beckham´s Miami project|
|Neymar: I play for Messi, he´s the man|
|Barcelona reveal details of Andre Gomes deal|
|Suarez bullish over Barcelona prospects|
|Ajax claim Napoli keen on Milik to replace Higuain|
|Totti labels Higuain´s Juventus move ´a disaster´|
|Juventus confirm Higuain deal|
|Pato to Villarreal ´in the final stage´|
|PSG sign Lo Celso|
|Muller: Beating Dortmund will be more fun this season|
|Juventus sign Higuain from Napoli for €90m|
|Pastore: I´m like God in Paris|
|Injured Lanzini out of Olympics|
|Allegri unperturbed by Higuain fee|
|Menezes replaces Bento at Cruzeiro|
|Sporting rejected major bids from Inter and Liverpool for Joao Mario, claims father|
|Pochettino pleased by Tottenham despite Juventus defeat|
|Eriksson: Allardyce the right man for England|
|Mourinho makes United train after stepping off plane from China|
|Hazard can still match Messi, says Pedro|
|Pjanic shows there is life at Juve, with or without Pogba|
|Juventus 2 Tottenham 1: Benatia bags win for Serie A champions|
|Dembele: I am not the Bundesliga´s next superstar|
|Lyon claim €35m Arsenal offer for Lacazette rejected|
|Donnarumma dreaming of Milan captaincy as he eyes long-term stay|
|Robson: Ibrahimovic can match Van Persie´s first year at United|
|Rooney should remain England captain - Eriksson|
|Emery wants new striker at PSG|
|Santos accept Juventus bid for Gabriel|
|Eriksson expects Sweden to try and tempt Ibrahimovic out of retirement|
|Spurs signing Janssen almost quit|
|Leicester stay best for Mahrez - Ranieri|
|Allardyce to take Mourinho cue on Rooney|
|Ings ready to outdo big-money signings|
|Henderson optimistic over Liverpool campaign|
|Allardyce hardened to the challenge of England post|
|Barcelona announce record revenues for 2015-16|
|Moyes enjoys Sunderland win as Palace beat Colchester|
|Stoke complete Allen signing|
|Roma coach Spalletti warns suitors off Manolas|
|Cresswell out for up to four months with knee injury|
|Burnley fan banned by club for racist abuse|
|Dad won´t let me play at the Olympics - Larsson Sr pulls rank|
|Kostic joins Hamburg on five-year deal|
|Tevez: I´d turn down Chelsea and Napoli to stay at Boca|
|Mayoral inspired by Benzema for Wolfsburg stint|
|Allardyce straight into competitive action with England|
|Liverpool, Sevilla fined for Europa League final incidents|
|Barcelona seal Guillemenot signing as part of new Servette deal|
|Niersbach handed one-year ban over World Cup corruption|
|Chelsea and Everton ´still interested´ as Koulibaly eyes Napoli exit|
|´Still working hard´ - Balotelli trains with Liverpool kids|
|Winter breaks, long-ball football and the World Cup: Allardyce in his own words|
|Inter warn Napoli Icardi is not for sale|
|Zanetti wants Simeone back at Inter|
|Stoke snap up Sobhi|
|PSG tougher under Emery - Lucas Moura|
|Totti not ready for retirement - Pallotta|
|Confident Allardyce reveals plan for England success|
|Pochettino to discard three Tottenham players|
|Allardyce: Rooney must wait for captaincy decision|
|Aubameyang: I will only leave Dortmund for Real Madrid|
|Allegri silences questions on Pogba|
|Bruce stands by decision to quit Hull City|
|Pochettino: Not the right time for Argentina job|
|Inter yet to approach De Boer with Mancini exit rumoured|
|Ancelotti trusts me more than Guardiola - Ribery|
|Wijnaldum rejected Everton for Klopp|
|Pre-season Manchester derby cancelled|
|Coutinho excited by ´fast´ Liverpool recruits|
|Cristiano Ronaldo and Conor McGregor step into the ring together|
|Mancini coy on reports linking Icardi to Napoli|
|Nolito reveals why he chose Man City over Barcelona|
|Inter 1 Paris Saint-Germain 3: Icardi absence in defeat fuels Napoli talk|