Celtic are inches away from extending their lead as Virgil van Dijk curls a fabulous free-kick over the defensive wall, with goalkeeper Marian Kello a relieved spectator.

Ross Caldwell is on for James Marwood as St Mirren look to spice up their attack.

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I've found a picture of Celtic's opening goal. That should clear up the identity of the scorer. Ahem...

Ross Davidson on Twitter: "Golf XI, How about Caley Thistle legend Mikey Teesdale #bbcsportscot"

No hat-trick for John Guidetti as he trots off to warm applause from the away fans. Stefan Scepovic is on for the last 25 minutes.

Celtic move Anthony Stokes into a central role and the ploy pays off immediately as he slips a fantastic reverse pass through to John Guidetti and the Swede pokes a shot past Marian Kello.

It was straight at the keeper, who will think he should have stopped it. I'm sure all the St Mirren supporters will certainly think he should have done better.

Jim Goodwin is booked for a late nibble at the shins of John Guidetti.

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Kenny McLean, who netted St Mirren's winner in their last league match, popped up in the box to draw the the home side level.

St Mirren substitute Gregg Wylde does well to outmuscle Efe Ambrose and drills a low cross to the near post where Callum Ball gets a touch but it sits up nicely for Craig Gordon to make a comfortable save.

Callum McGregor fashions room for a shot on the turn which is deflected over. From the Celtic corner that follows, Anthony Stokes is played in for a raking shot but it doesn't trouble goalkeeper Marian Kello.

The news from the BBC Radio Scotland commentary box is that former Celtic goalkeeper Pat Bonner has dropped a cup of tea all over his colleagues. Not so safe hands these days...

Celtic's Mubarak Wakaso is cautioned for a late challenge on Jim Goodwin. A touch of frustration from the winger, who has been kept very quiet?

A terrible throw out from Craig Gordon leads to St Mirren's first home goal in the league. Sean Kelly rolls a pass to John McGinn, who drills a low cross into the penalty box for Jason Naismith to have a shot. Gordon makes a great diving save but Kenny McLean is in the right spot to stroke in the loose ball.

We're up and running again at St Mirren Park.

Gregg Wylde is on for St Mirren, with Jeroen Tesselar making way.

St Mirren Official on Twitter: "Having watched the replay again it's almost impossible to tell if it's Guidetti or Goodwin that scored. #dubiousgoalspanel"

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That's two goals in two games for on-loan Manchester City striker John Guidetti (right) now.

BBC Scotland's senior football reporter Alasdair Lamont at St Mirren Park

"Very disappointing for St Mirren to lose a goal just before the break. They've held their own against the champions, who've lacked a bit of invention, but Emilio Izaguirre provided that with an incisive pass for Scott Brown and his cross proved impossible for Jim Goodwin and Marian Kello to defend. Now Celtic will want to kill the game off, while St Mirren need to retain the belief they showed in that first period."

BBC Sportsound pundit Pat Bonner

"Celtic need to step it up in the second half; the passing and build-up has been too slow. I don't think playing Callum McGregor centrally is working. St Mirren are working. There was only really one moment when they didn't do their duties and they were punished."

It's not been much of game but we a goal now and it's the champions who lead in Paisley thanks to that scrambled effort on 42 minutes. John Guidetti is still getting the credit and it was his determination to get on the end of Scott Brown's low delivery that led to the goal even if he didn't get the final touch.