That's enough from me. We'll have Saturday's Premiership highlights online from 18:00 GMT, with today's game appearing at midnight.
Of course, Sportscene will be on BBC One Scotland at 22:30, with David Currie sitting in for regular presenter Jonathan Sutherland, who is under the weather...
We'll have more adventures in live text next weekend. Enjoy what's left of your weekend...
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Celtic simply go marching on. Ronny Deila's men were a bit sluggish to start with but grew stronger and stronger at McDiarmid Park, running out comfortable winners.
Motherwell travel to Celtic Park next Saturday.
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St Johnstone stay in fourth place, with their seven-game unbeaten sequence over. Next up is another home game, with Hearts, the team immediately above them, in Perth next weekend.
Manager Tommy Wright was upbeat despite today's defeat, suggesting his team had enough chances to win the game. That's maybe a stretch. There were a few good openings for the hosts in the first half but the scoreline tells a very different story.
Wizard of Oz
Celtic manager Ronny Deila on Tom Rogic
“He’s getting better and better. Technically he’s very good, finding pockets between the lines, good penetrating passes. It’s fun to see.”
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Quote Message: I'm always disappointed when we lose but I'll get over that quickly because I'm not disappointed with the performance. We created good chances against a quality side and we'll dust ourselves down. from Tommy Wright St Johnstone manager
I'm always disappointed when we lose but I'll get over that quickly because I'm not disappointed with the performance. We created good chances against a quality side and we'll dust ourselves down.
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Nadir Ciftci, Craig Gordon and Tom Rogic will hog the headlines for Celtic but Mikael Lustig is worthy of a mention. The full-back was up and down the flank all day and had a hand in two goals.
"He's a seven out of 10 every week," enthuses Sportsound pundit Allan Preston. "His levels of consistency are fantastic."
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Good day for Gordon
Craig Gordon had a shocker on Thursday, gifting Fenerbahce their opening goal. Today the Celtic goalie was back to his best, making two good saves to deny Michael O'Halloran and Murray Davidson in the first half.
"He was unbelievable," manager Ronny Deila tells BBC Radio Scotland.
Cheer for Ciftci
Quote Message: We had a tough game on Thursday and had to recover quickly. It's a heavy pitch and hard on the legs so it's pleasing to get the win. There is always pressure at a club like this so I need to make the most of the chances I get. from Nadir Ciftci Celtic striker
We had a tough game on Thursday and had to recover quickly. It's a heavy pitch and hard on the legs so it's pleasing to get the win. There is always pressure at a club like this so I need to make the most of the chances I get.
FULL-TIME
St Johnstone 0-3 Celtic
The first half was feisty and evenly contested but Celtic strolled to maximum points from the moment Dedryk Boyata thumped in a header for goal number two early in the second period.
Nadir Ciftci struck either side of that effort as the champions move four points clear at the top.
Post update
We'll get two minutes of stoppage time at McDiarmid Park.
Post update
No hat-trick for Nadir Ciftci as the Celtic striker makes way for Scott Allan. The big striker will be feeling much better about himself after doubling his tally for the season.
Post update
St Johnstone will stay fourth in the Premiership as their seven-game unbeaten sequence is brought to a shuddering halt.
You can't afford to squander three good one-on-one chances against the champions.
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Celtic might have been considered vulnerable without top scorer Leigh Griffiths and midfield anchor Nir Bitton but they have grown stronger and stronger in this game and are making light work of what looked like a very tricky fixture.
This will be 10 wins on the spin this season in post-European games for Celtic, which is impressive. The bad news is there will be no more European games.
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Celtic also make change and there is time for striker Carlton Coleto get among the goals, with Tom Rogic leaving us early and getting a richly deserved round of applause for his efforts.
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Ten minutes to go and Saints withdraw top scorer Steven MacLean, with Chris Kane his replacement.
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St Johnstone are struggling to get a touch as Celtic pop the ball around with increasing confidence. The champions are moving four points clear of Aberdeen and have a game in hand on their nearest challengers.
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St Johnstone resistance is seriously crumbling now as James Forrest scurries forward and drills an inviting delivery across the face of goal. No takers in green and white though...
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It's not going to get any easier for St Johnstone as Celtic introduce crafty playmaker Kris Commons. Stuart Armstrong is the man making way.
GOAL St Johnstone 0-3 Celtic (Ciftci)
Nadir Ciftci is doing a cartwheel to celebrate as he nods in a delivery from Mikael Lustig.
An impressive run and cross from the Swedish defender, simple header, not so great cartwheel...
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Tom English
BBC Sport Scotland at McDiarmid Park
Quote Message: Emphatic start to the second half from Celtic. Dedryck Boyota went close to scoring from a Callum McGregor corner in the first half and the same combination managed to pull it off this time. Again, Saints will be angry to concede within their own six-yard box. The home team are resilient, but at 2-0 are they as resilient as they need to be now?
Emphatic start to the second half from Celtic. Dedryck Boyota went close to scoring from a Callum McGregor corner in the first half and the same combination managed to pull it off this time. Again, Saints will be angry to concede within their own six-yard box. The home team are resilient, but at 2-0 are they as resilient as they need to be now?
Live Reporting
Colin Moffat
All times stated are UK
Get involved
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Latest PostPost update
That's enough from me. We'll have Saturday's Premiership highlights online from 18:00 GMT, with today's game appearing at midnight.
Of course, Sportscene will be on BBC One Scotland at 22:30, with David Currie sitting in for regular presenter Jonathan Sutherland, who is under the weather...
We'll have more adventures in live text next weekend. Enjoy what's left of your weekend...
Post update
Celtic simply go marching on. Ronny Deila's men were a bit sluggish to start with but grew stronger and stronger at McDiarmid Park, running out comfortable winners.
Motherwell travel to Celtic Park next Saturday.
Post update
St Johnstone stay in fourth place, with their seven-game unbeaten sequence over. Next up is another home game, with Hearts, the team immediately above them, in Perth next weekend.
Manager Tommy Wright was upbeat despite today's defeat, suggesting his team had enough chances to win the game. That's maybe a stretch. There were a few good openings for the hosts in the first half but the scoreline tells a very different story.
Wizard of Oz
Celtic manager Ronny Deila on Tom Rogic
“He’s getting better and better. Technically he’s very good, finding pockets between the lines, good penetrating passes. It’s fun to see.”
Post update
Post update
Nadir Ciftci, Craig Gordon and Tom Rogic will hog the headlines for Celtic but Mikael Lustig is worthy of a mention. The full-back was up and down the flank all day and had a hand in two goals.
"He's a seven out of 10 every week," enthuses Sportsound pundit Allan Preston. "His levels of consistency are fantastic."
Good day for Gordon
Craig Gordon had a shocker on Thursday, gifting Fenerbahce their opening goal. Today the Celtic goalie was back to his best, making two good saves to deny Michael O'Halloran and Murray Davidson in the first half.
"He was unbelievable," manager Ronny Deila tells BBC Radio Scotland.
Cheer for Ciftci
FULL-TIME
St Johnstone 0-3 Celtic
The first half was feisty and evenly contested but Celtic strolled to maximum points from the moment Dedryk Boyata thumped in a header for goal number two early in the second period.
Nadir Ciftci struck either side of that effort as the champions move four points clear at the top.
Post update
We'll get two minutes of stoppage time at McDiarmid Park.
Post update
No hat-trick for Nadir Ciftci as the Celtic striker makes way for Scott Allan. The big striker will be feeling much better about himself after doubling his tally for the season.
Post update
St Johnstone will stay fourth in the Premiership as their seven-game unbeaten sequence is brought to a shuddering halt.
You can't afford to squander three good one-on-one chances against the champions.
Post update
Celtic might have been considered vulnerable without top scorer Leigh Griffiths and midfield anchor Nir Bitton but they have grown stronger and stronger in this game and are making light work of what looked like a very tricky fixture.
This will be 10 wins on the spin this season in post-European games for Celtic, which is impressive. The bad news is there will be no more European games.
Post update
Celtic also make change and there is time for striker Carlton Coleto get among the goals, with Tom Rogic leaving us early and getting a richly deserved round of applause for his efforts.
Post update
Ten minutes to go and Saints withdraw top scorer Steven MacLean, with Chris Kane his replacement.
Post update
St Johnstone are struggling to get a touch as Celtic pop the ball around with increasing confidence. The champions are moving four points clear of Aberdeen and have a game in hand on their nearest challengers.
Post update
St Johnstone resistance is seriously crumbling now as James Forrest scurries forward and drills an inviting delivery across the face of goal. No takers in green and white though...
Post update
It's not going to get any easier for St Johnstone as Celtic introduce crafty playmaker Kris Commons. Stuart Armstrong is the man making way.
GOAL St Johnstone 0-3 Celtic (Ciftci)
Nadir Ciftci is doing a cartwheel to celebrate as he nods in a delivery from Mikael Lustig.
An impressive run and cross from the Swedish defender, simple header, not so great cartwheel...
Post update
Tom English
BBC Sport Scotland at McDiarmid Park