St Mirren 2-0 Celtic: Impressive Buddies stun defending champions
St Mirren #StMirren
Mark O’Hara lost his marker to head St Mirren in front
St Mirren stunned a subdued Celtic by inflicting their first league defeat in 364 days and ending the 100% start to their Scottish Premiership defence.
Mark O’Hara rose unmarked to head the Paisley side in front shortly before half-time – the only effort on target in a largely flat opening 45 minutes.
And Jonah Ayunga nodded the impressive hosts’ second after the break to inflict Celtic’s first league loss since defeat at Livingston on 19 September last year and leave them two points above Rangers at the summit.
A third league win of the campaign takes St Mirren above Livingston into third place on goal difference.
The pre-match minute’s applause in memory of Queen Elizabeth was disrupted by chants from the away end.
And Celtic’s opening half was subdued, with David Turnbull, Aaron Mooy and Daizen Maeda off target with speculative efforts.
St Mirren seized their moment when Ryan Strain advanced on the right and delivered to the back post for the unmarked O’Hara to finish powerfully.
The visitors were now facing a new problem, having not trailed in a previous domestic game this season. They responded with a blocked Mooy shot and Liel Abada’s overhead kick, which went over.
Reo Hatate and Jota took over from Mooy and Maeda at the break, which brought an uplift in intensity from Celtic, but the defending champions were soon caught out at a thrown-in.
Declan Gallagher’s lofted delivery was headed up and around the box before Main nodded down for Ayunga to finish. Replays hinted at a possible offside but that did little to quell the home crowd’s celebrations.
More Celtic changes followed, with Giorgos Giakoumakis and Sead Haksabanovic replacing Abada and Turnbull. But again St Mirren threatened from wide right with Strain crossing for O’Hara to head wide.
Headed attempts by Giakoumakis and Mortiz Jens were collected by home keeper Trevor Carson as Celtic pushed to get back into the match. And Carson cut out a Hatate cross in the six-yard box, forcing Richard Tait to make an important clearance.
And Jota’s late header wide all but confirmed the result.
Player of the match – Jonah Ayunga 
It was not just his goal that counted with the striker running tirelessly in attack Discipline the key as St Mirren halt champions – analysis
Crucial to the hosts’ success was discipline – man marking, the back five holding an appropriate line and restricting as much space as they could in their own half.
And Stephen Robinson’s side were able to give Celtic’s recast back four cause for concern even before the O’Hara opener, a slip by Stephen Welsh letting Ayunga into a dangerous area early on.
They took encouragement from those moments and pounced when afforded the chance to put aerial deliveries into the box. And the work didn’t stop at 2-0, with the same tracking back and defensive endeavour securing a clean sheet.
Celtic’s starting line-up reflected their busy schedule with six changes from the midweek Champions League draw with Shakhtar Donetsk.
The zip so apparent in their play in previous games was strangely absent and their trademark passes in behind defenders also missing, primarily due to Matt O’Riley only appearing for the closing stages.
After 38 unbeaten league games prior to this game, Ange Postecoglou’s team have played and will play better than they did in Paisley.
What they said
Celtic manager Ange Postecoglou: “First thing, credit to St Mirren, they worked really hard and were committed to their game plan and made it difficult for us. There are always reminders we still have work to do.
“We didn’t perform in any of the areas we like to perform in and have been performing in. There isn’t anything hugely positive we can take from today, including team selection – probably wasn’t right.”
What next?
After the international break, St Mirren host Livingston in the Scottish Premiership on 1 October, when Celtic are at home by Motherwell (both 15:00 BST).
Player of the match
TaitRichard Tait
St Mirren
Squad number2Player nameTait
Squad number11Player nameKiltie
Squad number13Player nameGogic
Squad number7Player nameAyunga
Squad number10Player nameMain
Squad number18Player nameDunne
Squad number6Player nameO’Hara
Squad number16Player nameErhahon
Squad number3Player nameTanser
Squad number17Player nameBaccus
Squad number31Player nameGallagher
Squad number22Player nameFraser
Squad number23Player nameStrain
Squad number1Player nameCarson
Celtic
Squad number1Player nameHart
Squad number42Player nameMcGregor
Squad number6Player nameJenz
Squad number3Player nameTaylor
Squad number8Player nameFuruhashi
Squad number11Player nameAbada
Squad number13Player nameMooy
Squad number57Player nameWelsh
Squad number38Player nameMaeda
Squad number14Player nameTurnbull
Squad number56Player nameRalston
Squad number17Player nameJota
Squad number41Player nameHatate
Squad number7Player nameGiakoumakis
Squad number33Player nameO’Riley
Squad number9Player nameHaksabanovic
Line-ups St Mirren
Formation 5-3-2
1Carson
23Strain22Fraser31Gallagher18Dunne3Tanser
17Baccus16Erhahon6O’Hara
7Ayunga10Main
Substitutes
Celtic
Formation 4-3-3
1Hart
56Ralston57Welsh6Jenz3Taylor
42McGregor13Mooy14Turnbull
11Abada8Furuhashi38Maeda
Substitutes
Live Text
Match ends, St. Mirren 2, Celtic 0.
90’+5′
Second Half ends, St. Mirren 2, Celtic 0.
90’+4′
Sead Haksabanovic (Celtic) is shown the yellow card.
90’+3′
Foul by Sead Haksabanovic (Celtic).
90’+3′
Ethan Erhahon (St. Mirren) wins a free kick on the right wing.
90’+2′
Corner, St. Mirren. Conceded by Moritz Jenz.
90’+1′
Corner, St. Mirren. Conceded by Sead Haksabanovic.
90′
Attempt missed. Jota (Celtic) header from the centre of the box is high and wide to the left. Assisted by Sead Haksabanovic with a cross.
89′
Keanu Baccus (St. Mirren) is shown the yellow card for a bad foul.
88′
Sead Haksabanovic (Celtic) wins a free kick on the left wing.
88′
Foul by Marcus Fraser (St. Mirren).
88′
Giorgos Giakoumakis (Celtic) wins a free kick in the defensive half.
88′
Foul by Alexandros Gogic (St. Mirren).
87′
Foul by Moritz Jenz (Celtic).
87′
Greg Kiltie (St. Mirren) wins a free kick in the attacking half.
84′
Anthony Ralston (Celtic) is shown the yellow card for a bad foul.
84′
Foul by Anthony Ralston (Celtic).
84′
Charles Dunne (St. Mirren) wins a free kick in the defensive half.
82′
Attempt saved. Sead Haksabanovic (Celtic) right footed shot from outside the box is saved in the bottom left corner. Assisted by Reo Hatate.
82′
Attempt blocked. Matt O’Riley (Celtic) left footed shot from outside the box is blocked. Assisted by Reo Hatate.