Reports from the weekend's Scottish Premiership and Championship matches.Read more
- Celtic take 13-point lead at top
- Armstrong scores for Celtic
- Injured Griffiths misses out
- Killie fail to make top six
So Celtic extend their lead over Aberdeen to 13 points, but the Dons can bring that back down to 10 on Saturday when they travel across to Inverness.
There are three other Premiership fixtures - and plenty more big games in the Championship too.
So join us for more live coverage of Scottish football tomorrow.
Kilmarnock boss Lee Clark hailed his players for their battling performance.
"Disappointed for the players," he told BBC Scotland. "I thought they were terrific.
"I thought the game plan was really strong, defensively we've done great - one lapse and Celtic have scored.
"Overall, my emotion is pride in my players' performance
"Congratulations to them, because we were depleted and we had to throw a couple of players in at the deep end after just coming back from injury."
Celtic manager Brendan Rodgers was content with the win but thought there was room for improvement.
"I thought first half we played very well in terms of our football, although we gave them a couple of half chances by our play," he told BBC Radio Scotland.
"It was a great finish by Stuart Armstrong then Kilmarnock got more aggressive and more direct in the second half and stopped us building.
"So at times we were playing on the counter attack but still had chances to kill the game off.
"In the main, it was a great victory on the back end of an international break on an astroturf pitch against a side making it difficult."
You can now read Chris McLaughlin's view of proceedings at Rugby Park, with his match report now online.
Brendan Rodgers won't be too happy, but Celtic ground it out and that's what good sides do.
Lee Clark will be sitting in there saying that his players did what he asked of them to a man, but Celtic march on.
Celtic go 13 points clear at the top of the Premiership as Kilmarnock fail in their bid to move into the top six.
That's seven domestic victories in a row without conceding a goal for Brendan Rodgers' side.
They have now gone six games without defeat since losing at home to Borussia Monchengladbach in the Champions League.
Could that be a worry for Celtic ahead of Wednesday's visit by Barcelona as goalkeeper Craig Gordon limps away after slipping as he takes a free-kick?
Celtic's Scott Brown gives away another foul and is shown the yellow card. From Souleymane Coulibaly's curled free-kick, Dedryck Boyata has to clear from in front of his own goal. Celtic are living dangerously.
Last throw of the dice by Killie's Lee Clark as he sends on midfielder Callum McFadzean.
Tom Rogic tries his luck from long range, but the midfielder fires straight at Killie goalkeeper Jamie MacDonald.
Celtic make what looks like a defensive change, with Nir Bitton replacing winger James Forrest in midfield.
It is Celtic captain Scott Brown's turn to give away a free-kick in a dangerous position. Gary Dicker's header is deflected wide, but Celtic clear from the corner.
So close to a second for Celtic as James Forrest sets up Mikael Lustig for a drive against the outside of a post.
Souleymane Coulibaly, the last Kilmarnock player to score against Celtic, is brought on to replace Jordan Jones as manager Lee Clark goes for broke with another striker.
It is end-to-end stuff now and Scott Boyd back-heels off his own line to prevent Celtic extending their lead as James Forrest fires towards goal.
Killie break quickly and Nathan Tyson sets up Adam Frizzell to fire low and powerfully but straight at goalkeeper Craig Gordon.
Kilmarnock captain Stevie Smith goes in the book after pulling down James Forrest.
While it's still 1-0, and with Celtic still being as sloppy as they are, Kilmarnock have a chance, but they have no goalscorers.
Dedryck Boyata hands Kilmarnock a chance from a free-kick with a lazy trip 20 yards from goal, but Jordan Jones' shot is straight at goalkeeper Craig Gordon.
Adam Frizzell's pass deflects off a Celtic foot and is heading for goal before Celtic goalkeeper Craig Gordon srambles it wide for a corner.
Brendan Rodgers is prowling the touchline in uncharacteristic fashion, obviously frustrated by the way his Celtic side keep giving the ball away.
And he immediately sends on Tom Rogic, back from playing for Australia against Thailand, to replace Patrick Roberts in midfield.
The game is opening up now and you just hope that Kilmarnock have enough energy about them to last the pace.
Kilmarnock almost hand substitute Nathan Tyson a chance to score with his first touch seconds after replacing Flo Bojaj. Jordan Jones whips a cross into the six-yard box, but goalkeeper Craig Gordon punches clear after diving full stretch to deny the 34-year-old striker.
Jamie MacDonald thwarts Celtic twice in quick succession. Having come to the edge of his box to intercept a through ball, it drops to Patrick Roberts and the goalkeeper does well to back track and turn away one-handed an attempted clever chip from the winger.
BBC Sport Scotland at Rugby Park
You have to fear for Kilmarnock now. They were holding Celtic at arms length until Armstrong provided the sucker punch just before the break. Brendan Rodgers' side is so dangerous from so many different areas.
Celtic race upfield and Callum McGregor has a great chance inside the penalty area but finds the outstretched foot of goalkeeper Jamie MacDonald with team-mate Patrick Roberts screaming for a cut-back.
Scott Sinclair lashes into the stand from the rebound.
Kilmarnock start the second half and have 45 minutes to rescue something from the game and prevent Celtic stretching their Premiership lead to 13 points.
Lee Clark will be happy with Kilmarnock's endeavour and attitude and, if they can get a bit more belief in themselves, they can give Celtic some problems. But it is because Celtic have handed them scraps
Celtic have been playing what the guys in the radio studio are describing a "three and a half at the back".
Callum McGregor has been playing at left-back when Kilmarnock have been on the attack but on the wing when they go forward.
Meanwhile, two of their three wingers on the pitch - Patrick Roberts and Scott Sinclair (James Forrest being wide on the right) - are playing behind striker Moussa Dembele.
Going in the final third, Celtic have been fine but need to sharpen up in possession. Brendan Rodgers will be saying they can't give Kilmarnock too many chances to come at them.
Just when it looked like Kilmarnock would go in level at the break, Moussa Dembele gathers from James Forrest on the edge of the box, the striker plays Stuart Armstrong behind the defence and the midfielder fires his drive beyond goalkeeper James MacDonald.
Celtic winger Scott Sinclair is unfortunate to go into the referee's book after a sliding challenge on Luke Hendrie after the Kilmarnock defender had himself won the ball well from his opponent.
BBC Sport Scotland at Rugby Park
Killie boss Lee Clarke said his side gave Celtic too much respect last time. The pre-match team talk is working so far with the home side looking comfortable and dangerous at times. They're not committing needlessly though - well aware what Celtic are capable of when they hit their stride.
Moussa Dembele finishes in typically clinical fashion after a nod down from Stuart Armstrong, but the flag had already gone up because Celtic captain Scott Brown was in an offside position.
Not for the first time, Celtic give the ball away and Greg Taylor's cross to the front post finds the head of Flo Bojaj, but the on-loan Huddersfield Town striker's header misses the junction of bar and post.