Nikolas Agrafiotis spins and forces Ivor Pandur to hold an effort at his near post.

St Mirren continue to threaten.

St Johnstone enjoy a bit of territory in pursuit of a leveller but Celtic are clearing their lines.

The Rangers fans get behind their team, then the atmosphere turns edgy again after their team give away the ball in their own third.

This could go either way.

A stoppage while St Johnstone midfielder Josh Campbell has a wound seen to.

St Mirren have gradually been growing in confidence this entire half. Rangers' threat has waned.

Callum Davidson
Former St Johnstone manager on BBC Sportsound

I was just about to say St Johnstone need to just hold on in this little period because Celtic were building a bit of pressure there. Unfortunately they didn't. Much better from Celtic.

Image source, SNS

Rory Loy
Former Rangers and St Mirren striker on BBC Sportsound

What a move.

The pass takes out the whole Rangers defence and none of the home players react.

Fraser Taylor is straight through. He has to put his team 1-0 up.

Maybe he has too much time to think about, but it's a glorious opportunity spurned.

Oh my goodness.

St Mirren will not get a better chance tonight. Surely.

A third-man run from Fraser Taylor and the midfielder is sent clean through.

He has so much time to pick a spot but Ivor Pandur stays pretty much on his line and makes the stop.

Pat Bonner
Former Celtic goalkeeper on BBC Sportsound

They had bodies in the box, that's the difference.

There Baur was and all he had to do was get a good contact.

Good play from Hassan.

Celtic moving seven points clear of Rangers, as it stands.

Wonder what that will do to the atmosphere at Ibrox...

Double change for St Mirren, too.

Off go Calvin Ramsay and Chris Mochrie as Jayden Richardson and Luke Thomas enter.

Rory Loy
Former Rangers and St Mirren striker on BBC Sportsound

St Mirren have looked far more comfortable in this second half and the rumblings are coming from the Rangers fans.

With Kim and Curtis on, Rangers are back to that 4-2-3-1.

Image source, SNS

Celtic captain Callum McGregor, no stranger to a vital goal, lines up a shot on the edge of the St Johnstone box but cannot really get a hold of it and it deflects up into the arms of goalkeeper Toby Steward.

Kevin Kelsy and Badredine Bouanani's nights are over.

The Rangers forwards are replaced with Findlay Curtis and Kim Min-su.

St Johnstone are first to threaten in the second half with Taylor Steven released in the inside left channel and firing straight at the chest of Celtic goalkeeper Sam Johnstone. A foul by Saints soon ends the pressure.

Oi oi, that's not far away at all.

St Mirren win a free-kick about 20-odd yards from goal and Calvin Ramsay bends just over.

And St Johnstone start the second half.

No apparent changes at half-time for either side.