Weah concludes flowing Celtic move to seal points
Forrest jabs in Weah cross to score, then limps off with hamstring injury
Ajer dismissed after receiving second yellow card as Celtic finish with nine
St Johnstone's Clark makes series of fine saves
Substitute Edouard off injured within eight minutes
Toljan on for Lustig at break to make Celtic debut
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St Johnstone 0-0 Celtic
Celtic, pressing for the opening goal, attack through Callum McGregor. As the midfielder is about to pull the trigger, team-mate Kristoffer Ajer whips in a shot, deflected, and the ball trundles into the arms of a grateful Zander Clark.
St Johnstone 0-0 Celtic
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageIt's a position that the fans think they have to strengthen and the'll probably have to do again in the summer. Let's see what Toljan can do and see what ability he has got, coming from a big club like Borussia Dortmund
St Johnstone 0-0 Celtic
And we're back under way at McDiarmid Park.
St Johnstone 0-0 Celtic
Jeremy Toljan makes his Celtic debut, coming on for Mikael Lustig.
HT: St Johnstone 0-0 Celtic
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageThe disappointing thing from Celtic's point of view is that they have not tested Zander Clark and they will probably have to change it a bit at half-time to break through this St Johnstone defence
Image source, SNSHalf-time: St Johnstone 0-0 Celtic
Alasdair Lamont
BBC Sport Scotland at McDiarmid Park
Intriguing first period in Perth, with Celtic having 68% of possession but only one effort on target. St Johnstone’s defensive discipline has been exemplary, as it will need to be in the second half to take something from the game. They’re also a threat on the counter-attack, which Brendan Rodgers will be wary of.
Image source, SNSSt Johnstone 0-0 Celtic
Image source, bbcWho is impressing? And who isn't at McDiarmid Park? Rate the players here
St Johnstone 0-0 Celtic
Willie Miller
Former Scotland defender on BBC Radio Scotland
Quote MessageIt's been a disciplined performance by the home side. They have been largely having to defend, but Celtic haven't managed to open them up and they've had a couple of chances
Chances spurned for both sides, a penalty appeal for Celtic and poor deliveries from set pieces. We've had everything bar a goal in Perth.
Hope springs eternal for the second 45...
St Johnstone 0-0 Celtic
St Johnstone have a free kick in a dangerous area after Emilio Izaguirre chops down Danny Swanson. However, as has been the case with the set-piece deliveries from both sides, it's poor and Celtic clear.
St Johnstone 0-0 Celtic
Two minutes of added time at the end of the first half.
St Johnstone 0-0 Celtic
Willie Miller
Former Scotland defender on BBC Radio Scotland
Quote MessageIzaguirre is a lucky man. That's three not violent but near violent challenges he's had and he's got away with them
St Johnstone 0-0 Celtic
Ryan Christie whips in a dangerous free-kick but St Johnstone repel the danger when a touch from a Celtic player would've taken it past Zander Clark.
From the corner, the visitors fail to profit.
St Johnstone 0-0 Celtic
Image source, BBC SportSt Johnstone 0-0 Celtic
Pat Bonner
Former Celtic goalkeeper on BBC Sportsound
Quote MessageA really good defensive performance by St Johnstone. Young Jason Kerr is taking up good positions and his reading of the game is very good
St Johnstone 0-0 Celtic
Ten minutes plus any added time remaining of a fascinating if goalless first half at McDiarmid Park. Two early chances for the hosts, followed by Celtic pressure, a penalty appeal and a flash of brilliance from Oliver Burke.
Shall we see a goal before the break?
St Johnstone 0-0 Celtic
Willie Miller
Former Scotland defender on BBC Radio Scotland
Quote MessageIt was just electric from Oliver Burke, but he was too quick for his team-mates...
St Johnstone 0-0 Celtic
For the first time in the game, Oliver Burke displays his trademark Forrest Gump gallop, speeding away from the St Johnstone defence.
The winger's low centre is parried by Zander Clark before Richard Foster clears the danger. Looks like Burke's Celtic team-mates need to sharpen their sprints to keep up with his lightning counters...
St Johnstone 0-0 Celtic
Alasdair Lamont
BBC Sport Scotland at McDiarmid Park
It might be chilly here in Perth but it’s been all-action so far, with the game flowing from end to end in the early stages. Saints have probably had the best two chances of the match so far, but Celtic are enjoying a lot of pressure and might have had a penalty. The noisy travelling support are willing their team to make the breakthrough.
St Johnstone 0-0 Celtic
Celtic manager Brendan Rodgers, with a vexed expression, takes his notebook and pen from his jacket pocket and scribbles down something of note.
The visitors have been unable to get someone on the end of a couple of decent deliveries from either flank.
St Johnstone will be ruing those early missed opportunities for Matty Kennedy and Tony Watt.