Celtic are seven points away from retaining the Scottish Premiership after a first-half goal blitz against relegation-threatened Kilmarnock.
The visitors were four up within 27 minutes after Kyogo Furuhashi swept them in front with ease, Daizen Maeda headed a quick second and Matt O’Riley struck twice.
Liam Donnelly got one back at the end of a first half that also featured a missed a missed penalty by Kyogo, with neither side finding the net after the interval.
South Korea head coach Jurgen Klinsmann was in attendance at Rugby Park hoping to see Oh Hyeon-Gyu and the striker replaced Kyogo at half-time.
Kilmarnock remain in the relegation play-off spot, a point above bottom side Ross County and below Dundee United on goal difference.
Celtic re-establish a 12-point advantage over Rangers and, with a vastly superior goal difference, Ange Postecoglou’s side effectively need two more wins from six games to clinch back-to-back titles.
After Fraser Murray conceded possession, Kyogo turned Joe Wright and raced clear on the right. The striker turned back and, as the Kilmarnock defence stood off, struck a low shot past Sam Walker for goal number 29 of the season. Great striker play but the league’s top scorer was afforded too much space.
Celtic’s second was well worked. Sead Haksabanovic released Alistair Johnston in the inside right channel and his chip was nodded back across goal into the net by Maeda.
There was no let-up from the visitors as O’Riley tested Walker at his left-hand post.
But the midfielder scored with his next attempt on 18 minutes, receiving Greg Taylor’s incisive pass and placing the ball low into the net with Killie again too passive.
Christian Doidge’s foolish trip on Taylor gave Kyogo the chance to reach the 30 mark from the spot, but the striker’s effort came back off the post and Maeda knocked the rebound wide.
The fourth was not long in coming, though, as Murray’s sliced clearance went backwards into his own box and Danny Armstrong’s header presented the ball for O’Riley to control and finish.
Beleaguered home manager Derek McInnes took action with defender Jeriel Dorsett and midfielder Alan Power sent on in place of midfielder Murray and striker Doidge, the change in shape eventually stemming Celtic’s flow.
And it was the visitors’ turn to err in first-half added time as captain Callum McGregor was robbed by Donnelly inside the box. The Northern Irishman’s first shot was blocked by Joe Hart, so was Armstrong’s but Donnelly retrieved and forced the ball in to reduce the hosts’ arrears.
The second period was far less incident-packed than the first, but Kilmarnock did carve one excellent chance. Armstrong swung in a brilliant cross from the right and Luke Chambers’ header was superbly blocked by Hart.
Oh was active in front of his international manager, trying his best to get across defenders and finding the side netting on one occasion. Team-mates Carl Starfelt, Tomoki Iwata and Johnston also threatened.
Player of the match – Matt O’Riley
Celtic goal hungry again at Rugby Park – analysis
When Celtic visited Rugby Park in August, Celtic were a goal up after seven minutes, three up by half-time and five in front by full-time. The start to this game was eerily familiar for Kilmarnock, with basic errors and lacklustre defending ruling out any possibility of gaining a foothold in the match.
The hosts were always huge underdogs but the ease with which they were bowled over in the opening half-hour was the last thing they need in their battle to avoid the drop, particularly with rivals Dundee United having found form with two wins.
To their credit, Kilmarnock got much closer to their opponents and restricted space in the second half. They now face six games which could define their season.
Comfortable Celtic wins this season are nothing new. Postecoglou’s side have won 9-0, 6-1, 5-0, 5-1 and 4-0 this term, continually rejecting the footballing convention of getting in front and sitting on a lead.
The league leaders need nine more points to reach 100, having moved beyond a century of league goals to 102 for the campaign with this win.
What’s next?
Kilmarnock visit St Mirren on Saturday (15:00 BST), when Celtic will be at home to Motherwell.
Line-ups
Kilmarnock
Formation 4-4-2
- 20Walker
- 2Mayo
- 5Taylor
- 19Wright
- 24ChambersSubstituted forJonesat 83′minutes
- 11ArmstrongSubstituted forWalesat 90′minutes
- 34WatsonSubstituted forLyonsat 84′minutes
- 22Donnelly
- 15MurraySubstituted forPowerat 31′minutes
- 26DoidgeSubstituted forDorsettat 31′minutes
- 23Vassell
Substitutes
- 1Hemming
- 3Dorsett
- 4Power
- 10Jones
- 16Robinson
- 17Lyons
- 21McInroy
- 25Alebiosu
- 29Wales
Celtic
Formation 4-2-3-1
- 1Hart
- 2JohnstonBooked at 86mins
- 4Starfelt
- 18Kobayashi
- 3Taylor
- 24Iwata
- 42McGregorSubstituted forTurnbullat 68′minutes
- 9HaksabanovicSubstituted forSummersat 88′minutes
- 33O’RileySubstituted forMooyat 68′minutes
- 38MaedaSubstituted forVataat 68′minutes
- 8FuruhashiSubstituted forOhat 45′minutesBooked at 71mins
Substitutes
- 13Mooy
- 14Turnbull
- 19Oh
- 25Bernabei
- 29Bain
- 53Summers
- 56Ralston
- 57Welsh
- 69Vata
- Referee:
- David Dickinson
- Attendance:
- 8,201
Live Text
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Match ends, Kilmarnock 1, Celtic 4.
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Second Half ends, Kilmarnock 1, Celtic 4.
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Attempt missed. Alistair Johnston (Celtic) right footed shot from the centre of the box is just a bit too high. Assisted by David Turnbull.
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Ben Summers (Celtic) wins a free kick in the defensive half.
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Foul by Jordan Jones (Kilmarnock).
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Attempt missed. Kyle Vassell (Kilmarnock) header from the centre of the box is just a bit too high. Assisted by Jordan Jones with a cross.
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Attempt missed. Kyle Vassell (Kilmarnock) left footed shot from the left side of the box misses to the right.
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Substitution, Kilmarnock. Bobby Wales replaces Daniel Armstrong.
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Rocco Vata (Celtic) wins a free kick on the left wing.
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Foul by Lewis Mayo (Kilmarnock).
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Substitution, Celtic. Ben Summers replaces Sead Haksabanovic.
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Attempt missed. Jordan Jones (Kilmarnock) right footed shot from outside the box is high and wide to the right. Assisted by Daniel Armstrong following a corner.
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Corner, Kilmarnock. Conceded by Alistair Johnston.
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Alistair Johnston (Celtic) is shown the yellow card for a bad foul.
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Foul by Alistair Johnston (Celtic).
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Jordan Jones (Kilmarnock) wins a free kick on the left wing.
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Attempt missed. Tomoki Iwata (Celtic) right footed shot from outside the box is close, but misses to the left. Assisted by David Turnbull.
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David Turnbull (Celtic) wins a free kick in the defensive half.
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Foul by Alan Power (Kilmarnock).
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Corner, Kilmarnock. Conceded by Alistair Johnston.
How to play
Rate players out of 10 throughout or after the game. The rater will close 30 minutes after the final whistle.
Rating range key = Give it up = Pure perfection
Kilmarnock
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Squad number20Player nameWalker
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Squad number2Player nameMayo
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Squad number5Player nameTaylor
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Squad number19Player nameWright
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Squad number24Player nameChambers
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Squad number11Player nameArmstrong
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Squad number34Player nameWatson
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Squad number22Player nameDonnelly
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Squad number15Player nameMurray
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Squad number26Player nameDoidge
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Squad number23Player nameVassell
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Squad number3Player nameDorsett
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Squad number4Player namePower
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Squad number10Player nameJones
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Squad number17Player nameLyons
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Squad number29Player nameWales
Celtic
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Squad number1Player nameHart
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Squad number2Player nameJohnston
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Squad number4Player nameStarfelt
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Squad number18Player nameKobayashi
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Squad number3Player nameTaylor
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Squad number24Player nameIwata
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Squad number42Player nameMcGregor
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Squad number9Player nameHaksabanovic
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Squad number33Player nameO’Riley
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Squad number38Player nameMaeda
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Squad number8Player nameFuruhashi
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Squad number13Player nameMooy
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Squad number14Player nameTurnbull
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Squad number19Player nameOh Hyeon-Gyu
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Squad number53Player nameSummers
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Squad number69Player nameVata