Napoli kept their Serie A title hopes alive in the most dramatic fashion in Turin on Sunday, Kalidou Koulibaly powering home a match-winning header in stoppage time against Juventus to move his side within one point of the Bianconeri.
It looked as though Juve were going to preserve their four-point advantage at the summit with four games to play and edge closer to a seventh successive Scudetto only for Koulibaly to throw the race wide open.
Compounding Juve's last-gasp defeat is the fact Massimiliano Allegri's men arguably have the tougher run-in of the two sides, with the Derby d'Italia away to Inter coming up next Saturday, and a clash with Champions League semi-finalists Roma awaiting in the penultimate round of fixtures.
Napoli, meanwhile, seeking to win a first Scudetto since 1989-90, when they were inspired to a second title in four seasons by the great Diego Maradona, visit Fiorentina next weekend hopeful of seizing on any further slip-ups from the leaders.
Napoli enjoyed an early sight of goal when Lorenzo Insigne fired wide in the first minute, and the passage of play proved costly for Juventus, as Giorgio Chiellini sustained an injury that ultimately forced him off 10 minutes later, having failed to convince in his attempts to shake off what appeared to be a muscle problem.
With full-back Stephan Lichtsteiner introduced and Benedikt Howedes shifting to centre-back, Juve went close for the first time in the 17th minute, Miralem Pjanic's deflected free-kick wrongfooting Pepe Reina and striking the far post, leaving the Napoli goalkeeper stranded.
His counterpart Gianluigi Buffon had to be alert to tip over a dipping cross-cum-shot from Mario Rui, who then slid in Marek Hamsik for the best chance of the first half in the 24th minute, only for the Napoli captain to drag his attempt across the face of goal and wide.
Insigne had the ball in the back of the net seven minutes before half-time, but Lichtsteiner smartly stepped up to catch his opponent offside.
Allegri responded to his team's underwhelming first-half showing by withdrawing Paulo Dybala in favour of Juan Cuadrado, while Maurizio Sarri introduced the fit-again and in-form Arkadiusz Milik a minute past the hour mark, taking off the relatively ineffectual Dries Mertens.
Substitute Piotr Zielinski tested Buffon from long range with seven minutes to go in what had been a tense second half, and the goalkeeper also had to claw away an awkward Jose Callejon delivery.
From the Spaniard's subsequent corner, Napoli grabbed the all-important goal, Koulibaly rising above the Juve backline to head home a powerful winner, the final whistle sparking wild celebrations among the visitors and ensuring a thrilling conclusion to the title race.
|Henry wants Bordeaux job, Wenger confirms|
|Pogba too inconsistent and not a leader, claims Scholes|
|PCB chairman Sethi resigns in letter to Pakistan prime minister Imran Khan|
|US Open comes too soon for Tsonga|
|Unpredictable results making 2018 F1 season a classic - Wolff|
|Mendy restricts phone use on Guardiola advice|
|Modric brands Inter approach claim ´the greatest nonsense in history´|
|Runners and Ryders: Olesen leapfrogs Poulter into last Team Europe berth|
|Kenedy escapes further action over Camarasa kick|
|England´s Bairstow suffers ´small fracture´ to finger|
|Gonalons joins Sevilla on loan from Roma|
|Modric, Ronaldo and Salah final UEFA Player of the Year nominees|
|Tottenham to play opening Champions League home match at Wembley|
|Karius´ Champions League blunders did not lead to Alisson signing - Klopp|
|Leeds considered €20m Conte offer before turning to Bielsa|
|Modric, Rakitic lead new era for World Cup finalists Croatia|
|Storm´s Chambers banned for three weeks, Smith injury not serious|
|Porte to race Vuelta after recovering from Tour crash|
|The Career Golden Masters: A run-down of Djokovic´s magnificent record|
|Japan send home four basketball players from Asian Games amid prostitution scandal|
|Rugby tackle bags helping Liverpool´s Alisson with Premier League life|
|Federer raring to go at US Open after Djokovic defeat|
|Chelsea boss Sarri plans to give up smoking|
|Alonso´s Toyota team stripped of Silverstone victory|
|Ceballos: No issue with former Real Madrid boss Zidane|
|MLS Review: Martinez equals single-season goalscoring record|
|Astros avoid sweep with win over Athletics|
|Seppi advances, Paire exits Winston-Salem|
|Bale feeling good as Madrid eye sweep of trophies|
|You can´t leave a house three-quarters built – Neville urges United to back Mourinho|
|Dodgers slugger Machado leaves game after being struck by pitch|
|Harden says Carmelo will ´be a good fit´ for Rockets|
|Morata: I never considered Chelsea exit|
|Gavrilova kicks off title defence in New Haven|
|Lopetegui pleased with Bale and Real Madrid after LaLiga opener|
|It´s a very special moment – Djokovic revels in Golden Masters achievement|
|Sorrentino thanks Ronaldo for support after injury|
|Twins place Santana on DL with finger injury|
|Yankees´ Gregorius suffers ´pretty significant´ heel bruise|
|Snedeker ends PGA Tour drought with Wyndham Championship win|
|Spalletti unconcerned despite Inter´s underwhelming start|
|Djokovic makes history with Masters clean sweep in Cincinnati|
|Real Madrid 2 Getafe 0: Bale gives Lopetegui first LaLiga win|
|IndyCar driver Wickens taken to hospital after crash|
|Sherman calls for NFL to scrap ´idiotic´ helmet rule|
|Sassuolo 1 Inter 0: New-look Nerazzurri given early reality check|
|Hughton: Shock United win does not alter scale of Brighton´s task|
|Navas keeps place as Courtois waits on Madrid debut|
|Ndidi signs long-term Leicester City contract|
|Pandya tears through feeble England to put India in command|
|Alonso creates motorsport history with victory at Silverstone|
|Kovacic: Chelsea and Sarri believe in me|
|Brighton loss a big lesson for United – Pogba|
|Mistakes hit United´s confidence - Mourinho|
|Brighton and Hove Albion 3 Manchester United 2: Murray lifts Seagulls to another win over Mourinho|
|Quickfire Moon treble sets up Rhinos win|
|Manchester City celebrate win with Silva´s son|
|Brentford 2 Sheffield Wednesday 0: Maupay stars as Bees buzz by Owls|
|Guardiola delighted with fit and firing Aguero|
|Waring marks 200th event with maiden title in Gothenburg|
|Guardiola dismisses Mourinho´s ´disrespectful´ accusation|
|Hulkenberg proud to survive in F1´s pay driver era|
|It´s here, it´s real, get on with it - Dyche dismisses Europa League excuse|
|Grujic agrees Liverpool extension, joins Hertha on loan|
|Martial starts as Lukaku, Young return for Manchester United|
|Fury-Wilder to be staged in November or December - Warren|
|Manchester City 6 Huddersfield Town 1: Aguero hits hat-trick as champions triumph|
|Burnley 1 Watford 3: Hornets end away day woes as Deeney leads destructive display|
|McFarland cleared to leave Scotland and join Ulster|
|Simeone wants ´only the best´ for Filipe Luis amid PSG links|