Blaise Matuidi spared Paris Saint-Germain with a 94th-minute goal in a 2-2 draw at Saint-Etienne, extending PSG's unbeaten run to 30 games.
Having not suffered defeat in any competition since a 1-0 loss to Reims back in March - their only blight of any kind being a penalty shoot-out reverse in the Coupe de France against Evian – Laurent Blanc’s men were expected to continue their Ligue 1 title assault with some ease.
But they were made to dig deep to extend their sequence, with Matuidi proving the last-gasp hero.
A lively start from the hosts was rewarded with a goal from Benjamin Corgnet after 18 minutes, before Romain Hamouma took advantage of some comical defending to strike just after the break.
Fabien Lemoine controversially saw red just before the hour mark, before PSG roared back.
Edinson Cavani gave them hope with 68th-minute strike, before Matuidi’s injury-time leveller saved Blanc’s men from an embarrassing defeat.
Saint-Etienne were without experienced defender Jonathan Brison, while Mevlut Erding took his place on the bench after returning from injury.
Club captain Thiago Silva joined Christophe Jallet and Javier Pastore on the sidelines for PSG after failing to recover from a thigh injury, while midfield pair Marco Verratti and Thiago Motta returned from suspension.
Saint-Etienne took four points off PSG last season, and they created the first chance within the opening 10 minutes.
Faouzi Ghoulam broke free down the left-hand side before pulling back to Brandao on the edge of the area, but the Brazilian could not keep his shot down.
Zlatan Ibrahimovic and Cavani came into the match with 19 goals between them this season, but they struggled to assert any sort of early authority.
The hosts began to press themselves, and they were rewarded for their lively start after 18 minutes when a mistake by Marquinhos allowed Hamouma to get in behind the defence and square to Corgnet, who lashed his shot past Salvatore Sirigu.
Matuidi nearly restored parity two minutes later, powering a deflected effort just wide of the post.
The home side almost doubled their advantage in spectacular circumstances just after the half-hour mark, when Lemoine’s dipping long-range volley came back off the crossbar.
But they did grab a second after 51 minutes thanks to an embarrassing catalogue of errors in the PSG defence.
Francois Clerc’s whipped cross was spilled by Sirigu, before ricocheting off Marquinhos and into the path of Hamouma, who guided the ball home.
PSG were given a boost soon after though, when Lemoine was controversially shown a second yellow card for a challenge with Ezequiel Lavezzi, despite replays suggesting that the PSG man may have caught him with an elbow.
The visitors made their numerical advantage count just three minutes later when Maxwell found Cavani in the six yard box to tap home.
And just as it looked as though PSG were set for a rare loss, Matuidi's ball into the box eluded everyone and found its way into the net with Cavani and Irbahimovic in close attendance.
|Terry calls for new Drogba deal|
|Saul agrees bumper Atletico deal|
|Arsenal need to finish season strongly - Wenger|
|New Bilbao deal for Gurpegi|
|Terry: Too long between titles|
|Pepe puts Morata friendship aside for Champions League match-up|
|Hazard can be as good as Messi, Ronaldo - Fabregas|
|Carlisle ´deeply ashamed´ about suicide attempt|
|Tevez planning to win Champions League with Juve|
|Blatter ´knows absolutely nothing´ - Maradona|
|Allegri: Ancelotti a smart man|
|Sunderland academy coach to manage Oldham|
|Primeira Liga Review: Braga secure Europa League berth|
|Bruce backing Hull to respond against Burnley|
|Almeria 2 Celta Vigo 2: Bifouma, Zongo inspire hosts´ comeback|
|Arsenal can mount title bid - Wenger|
|Turkish Super Lig Review: Besiktas and Galatasaray remain locked at the top|
|Cagliari 4 Parma 0: Festa revival back in gear|
|Hull City 1 Arsenal 3: Sanchez at the double as visitors close on second|
|Blackpool - Huddersfield game will not be finished|
|Allegri vindicated by Juventus success|
|Russian Premier League Review: Krasnodar close the gap as Zenit slip up|
|Al Ahly dismiss Garrido|
|MLS Preview: Kinnear returns to Dynamo with Earthquakes|
|Ancelotti all out for victory against Juventus|
|Ramires recovering well after sickness|
|Prince Ali would back rival FIFA candidate to oust Blatter|
|Barcelona v Bayern Munich: Guardiola makes Camp Nou return|
|Kruse a target for Wolfsburg - Allofs|
|Fletcher backing Bournemouth to ´surprise a few´|
|Bremen agree deal with Fritz|
|Carver gets Newcastle backing|
|Blaszczykowski suffers groin tear|
|Boateng warns of Barca ´storm´|
|Brouwers agrees Gladbach extension|
|Benzema to miss Turin trip|
|England great Jimmy Greaves suffers stroke|
|Cabaye concerned by bit-part role at PSG|
|Parry: Anfield expansion a major boost|
|Ki targets Arsenal win and seventh spot|
|Pirlo eyes potential Champions League swansong|
|Mourinho rounds on critics after clinching title|
|Henderson: Liverpool can push on without Gerrard|
|Lack of goals a concern for Van Gaal|
|Hard to keep Benteke - Bacuna|
|MLS Review: Sporting KC end Chicago streak, Martins brace furthers NYC pain|
|Copa Libertadores Preview: River eye revenge in Superclasico|
|Garcia lauds ´impressive´ Roma|
|Pavon goal scores him a BMW for a month|
|Boca beat River in Superclasico|
|Inzaghi to blood youth after third straight Milan defeat|
|Blanc urges PSG to ´remain vigilant´|
|La Liga Review: Valencia go clear of Sevilla, crisis-stricken Elche safe|
|CAF Champions League Review: ES Tunis dumped out by Al Merreikh|
|Masterful Mourinho has Premier League and Chelsea singing his tune|
|Nantes 0 Paris Saint-Germain 2: Cavani nets again as Ibrahimovic returns|
|Napoli 3 Milan 0: Late treble saves hosts|
|Primeira Liga Review: Porto edge past strugglers Vitoria|
|Bundesliga Review: Hamburg claim last-gasp winner, Gladbach close in on Wolfsburg|
|Pochettino: Hart heroics the difference|
|Ligue 1 Review: Monaco remain on course for third, Lille cruise past Lens|
|Pellegrini silent over City future|
|Rome derby not on Lazio´s radar, says Pioli|
|Pardew laments penalty calls in Palace´s loss to champions|
|Serie A Review: Roma move back into second, Di Natale overtakes Baggio|
|Tottenham 0 Manchester City 1: Aguero heaps more misery on Spurs|
|Mourinho appears to take dig at old nemesis Guardiola|
|Mancini frustrated by resilient Chievo|
|Drogba coy over future after title triumph|
|Chelsea title win will not lead to domination - Mourinho|
|Inter 0 Chievo 0: More frustration for Mancini|
|Terry: I´ve proved Benitez wrong|
|BREAKING NEWS: Chelsea secure Premier League title|
|Chelsea 1 Crystal Palace 0: Title heads back to Stamford Bridge|
|League One Review: MK Dons promoted, as Orient, Notts County and Crawley go down|
|Dortmund striker Ramos set to miss Copa America|
|Williamson denies getting sent off on purpose|
|Eintracht Frankfurt´s Kittel suffers injury blow|
|Juventus v Real Madrid: Serie A kings set for Real test|
|United still control top-four destiny - Young|
|Record finish beyond Stoke - Hughes|
|Wellington Phoenix 0 Melbourne City 2: Surprise win sets up semi-final derby|
|Vidal already focused on Real|
|MLS Review: Revs hand Red Bulls first loss|
|AFC Champions League Preview: Wanderers facing elimination|
|Lyon stepped up despite pressure - Fournier|
|Gerrard anticipating emotional Anfield finale|
|´I´ve always wanted to score a free-kick past Neuer´ - Calhanoglu|
|Negredo: Pellegrini lost faith in me|
|Buffon had title doubts after Conte departure|
|Luis Enrique: I was worried during 8-0 win|
|Wilshere will return to his best - Wenger|
|Rodgers unconcerned by banner|
|Mourinho doesn´t want guard of honour|
|Deportivo La Coruna 1 Villarreal 1: Hosts come from behind|
|Juve canter to title success as Allegri wins over doubters|