Arsenal's Premier League title hopes are in tatters after Mathieu Flamini's late own goal in a 2-2 home draw with Swansea City.
Arsenal boss Arsene Wenger endured, rather than celebrated, his 1,000th game in charge as his side lost 6-0 at Chelsea on Saturday.
And things did not get much better as the tally ticked to 1,001 at the Emirates Stadium on Tuesday.
Wilfried Bony put the visitors in front with an early header, but substitute Lukas Podolski converted from close range in the 73rd minute, before providing the assist for Olivier Giroud just over one minute later.
The defining moment came in second-half stoppage time though, when the ball rebounded into the Arsenal net off Flamini after hitting the feet of goalkeeper Wojciech Szczesny.
The result sees Arsenal two points adrift of third-placed Liverpool, and six behind leaders Chelsea, while a point for Swansea will prove valuable in their fight for survival.
Kieran Gibbs and Alex Oxlade-Chamberlain both lined up for Arsenal after the Football Association cleared up the confusion that surrounded the former's sending off in Saturday's Stamford Bridge humiliation.
There was no mistaking the identity of Swansea's biggest change, as Michu – responsible for two late goals in his side's 2-0 win at Arsenal last season - came into Garry Monk's starting XI for the first time in more than three months.
It was Oxlade-Chamberlain who was first to test Michel Vorm in the Swansea goal, unleashing a fierce half-volley from the edge of the box.
Swansea posed little threat in the early stages, but found themselves ahead when left-back Neil Taylor, starting in place of Ben Davies, found Bony with a cross from deep, which the Ivorian headed home from 12 yards.
Arsenal boss Wenger refused to talk to the media in the build-up to Tuesday's match, but it was the home fans who fell silent in the immediate aftermath of the opener.
Half of the ground mustered a cheer nine minutes later when Per Mertesacker made the net ripple with a header from a corner, but his effort deceptively crept the wrong side of the left-hand upright.
Arsenal's quest for a leveller left them exposed at the back at times and Swansea wasted a chance to double their lead when they outnumbered the home defence four to two, before Santi Cazorla tested Vorm with a low strike two minutes from the break.
The hosts emerged for the second period with pre-interval boos still ringing in their ears, but their chances were limited, with Tomas Rosicky's wayward 20-yard strike about as good as it got for Wenger's men.
Podolski looked bright after coming on in place of Oxlade-Chamberlain though, and tapped home after good work by Gibbs down the right.
And the Germany attacker turned provider almost immediately after, providing the cross for Giroud to convert from close range moments later.
But Arsenal were left red-faced and despondent at the death, when Leon Britton's surge into the area prompted a series of unfortunate events that led to Flamini deflecting the ball into his own net.
|Everton 1 Lyon 2: Koeman feeling the heat, while Williams brawl overshadows spectacle|
|AC Milan 0 AEK Athens 0: Frustration mounts for Montella in dour draw|
|Giroud promised special winner, Wenger reveals|
|Former Croatia striker Klasnic undergoes third kidney operation|
|Red Star Belgrade 0 Arsenal 1: Giroud´s special winner lights up drab encounter|
|Shakespeare: Leicester will ´pull away´ from Premier League danger|
|Robben yet to hold talks over new Bayern Munich contract|
|Bilic denies West Ham have discipline problem|
|Benteke progressing ´ahead of schedule´|
|Ancelotti to Leicester unlikely, says Clement|
|Dyche not aware of any approach amid Leicester speculation|
|I love you, take my watch! – How Arnautovic earned a special gift from Mourinho|
|´Surprised´ Appleton calls for Foxes focus after Shakespeare sacking|
|Brighton boss Hughton feels ´unacceptable´ behaviour remains in football|
|Benzema ´very happy´ at Real Madrid amid Arsenal rumours|
|Azpilicueta admits to low mood in Chelsea camp|
|Bacca: I played for the worst AC Milan in history|
|Aluko ´100 per cent´ in England contention, says interim boss|
|Injured Napoli striker Milik hints at loan move|
|Dortmund not expecting Reus exit|
|Neymar plans to emulate Messi by mentoring Mbappe|
|Mourinho still unclear on fitness of Pogba and Fellaini|
|Heynckes happy with Muller form|
|Kane describes Ronaldo as ´role model´ following shirt swap|
|PSG star Mbappe: Monaco need time|
|I have full support of Everton board, claims Koeman|
|Wilshere: Arsenal´s character can´t be questioned|
|No-one can compete with Messi – Bartomeu|
|Man United risk losing identity under Mourinho – Bellamy|
|Valverde hopes Messi scores 200th European goal this season|
|Stop worrying about Chelsea – Conte hits back at Mourinho|
|Roma better than Chelsea, says Nainggolan|
|Basel coach Wicky demands more focus|
|Heynckes calls for patience from Bayern´s reserve stars|
|Emery calls for PSG improvement despite perfect start|
|Pique handball instinctive, says Barcelona boss Valverde|
|Dzeko was born to score – Di Francesco|
|Lemonis rues Olympiacos collapse against 10-man Barca|
|Rodgers: Individual class inhibiting Celtic|
|David Luiz experiment failed, admits Conte|
|Allegri not impressed despite crucial win|
|Svilar risks a lot – Mourinho was aware of Benfica youngster´s shortcomings|
|We played better against Atletico – Hazard|
|Job done for Mbappe and PSG after another big win|
|Simeone maintains ´absolute´ belief in Atletico despite Qarabag draw|
|CSKA Moscow 0 Basel 2: Xhaka, Oberlin do the damage|
|Juventus 2 Sporting CP 1: Late Mandzukic intervention saves wasteful Bianconeri|
|Bayern Munich 3 Celtic 0: Hoops outclassed on Heynckes´ return to Europe|
|Chelsea 3 Roma 3: Hazard brace rescues Conte´s men after Dzeko double|
|Anderlecht 0 Paris Saint-Germain 4: Mbappe takes one record as Cavani closes on another|
|Barcelona 3 Olympiacos 1:Ton-up for Messi as Pique sees red|
|Benfica 0 Manchester United 1: Rashford goal settles poor game after woeful Svilar error|
|Messi joins Ronaldo in European 100-goal club|
|Good results are on the way in the league - Salah|
|Algeria restore Madjer to the helm|
|Griezmann eyes qualification despite Atleti´s Qarabag stumble|
|FA chief Glenn denies Aluko´s ´bordering on blackmail´ claim|
|Mbappe surpasses Kluivert as Champions League´s highest-scoring teenager|
|Ozil is a warrior - Pires sympathises with Arsenal star|
|Benfica teen Svilar breaks Casillas´ Champions League record against Man Utd|
|Balotelli can improve even more - Favre|
|It was special to face role model Modric, says Winks|
|Robben named for Champions League century|
|You can´t question Arsenal´s character - Wenger hits back at Deeney|
|Qarabag 0 Atletico Madrid 0: Simeone´s side in trouble after shock draw|
|Guardiola´s Catalonia stance dismissed by Spanish minister|
|Oldham appoint Wellens over Scholes, Seedorf|
|FA apologises over Sampson remarks to Aluko and Spence|
|Montella willing to accept ´exaggerated´ Milan criticism|
|Napoli confirm Insigne adductor strain|
|Urawa Reds 1 Shanghai SIPG 0 (2-1 agg): Rafael Silva books Al Hilal decider|
|Not a tragedy if Italy miss World Cup, says Zola|
|Hummels: Bayern players contributed to Ancelotti´s sacking|
|Dzeko considers Chelsea among Champions League contenders|
|Cavani doesn´t need to be friends with Neymar|
|Ozil and Sanchez committed to Arsenal, Mertesacker claims|
|Don´t stress it - De Bruyne relaxed over initial Man City contract talks|
|Nagelsmann´s path will lead to Bayern, says Heynckes|
|Stones satisfied with strong Manchester City showing|
|Redknapp: Spurs boss Pochettino could manage Real Madrid|
|That will be hard to beat – Klopp revels in record win|
|Spurs showed they can compete with elite - Pochettino proud after Madrid draw|
|Ballon d´Or? We all know Messi is best, says Valverde|
|He´s getting better – Zidane backs Benzema|
|Napoli star Insigne unsure if he´ll be fit to face Inter|
|Manchester City can win Champions League, says Napoli boss Sarri|
|Berizzo plotting Sevilla´s revenge after Spartak Moscow humiliation|
|Porto boss Conceicao defends Casillas omission|
|We know it´s difficult now, admits Dortmund boss Bosz|
|It´s tough but it´s not over - Van Bronckhorst|
|Monaco know it will be difficult to qualify now, says Sidibe|
|I don´t know what happened - Sarri bemused by Napoli´s slow start|
|We are growing consistently, insists upbeat Zidane|