Celtic go 27 points clear at top of Premiership
Dembele (3), Sinclair & Henderson for Celtic
Substitute Dembele converted controversial penalty to make it 2-2
Watson & Wotherspoon had put Saints 2-1 up at half-time
Keith Watson
It is Saints' turn to threaten with a quick break and David Wotherspoon's effort is deflected wide. Danny Swanson's flighted corner finds Keith Watson at the back post and the defender's powerful header takes a nick off the top of Celtic captain Scott Brown's head before evading goalkeeper Craig Gordon's outstretched hand.
Image source, SNSSt Johnstone 0-1 Celtic
Liam Henderson fires a low cross into the Saints penalty box and Tam Scobbie doesn't know much about it, but the ball deflects wide of the far post off the defender's knee.
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Quote MessageHe's got to be taking these chances if he wants to stay in the team.
Mark Burchill, Former Celtic forward on Gary Mackay-Steven
St Johnstone 0-1 Celtic
Celtic squander a great opportunity to increase the lead on the break. Just as Saints were enjoying their best period of the game, Scott Sinclair bursts into the home half and sets up Gary Mackay-Steven, but the Scottish winger hesitates and his effort is blocked by goalkeeper Zander Clark.
St Johnstone 0-1 Celtic
Quote MessageSt Johnstone have steadied the ship and have grown into the game and had some good possession and a wonderful opportunity for Richard Foster
Willie Miller, BBC Radio Scotland pundit
St Johnstone 0-1 Celtic
Richard Foster makes a clever run into the Celtic penalty box and is found by Danny Swanson's sweet pass, but the former Aberdeen and Rangers man's Achilles heel has always been finishing and goalkeeper Craig Gordon comes out to make a fine block with his legs from close range.
St Johnstone 0-1 Celtic
Quote MessageI think St Johnstone have to make it more difficult for Celtic in the middle of the park. They are playing wee triangles around them and St Johnstone should be getting much closer to them
Mark Burchill, Former Celtic striker on BBC Radio Scotland
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St Johnstone 0-1 Celtic
Celtic goalkeeper Craig Gordon plays one of his lazy clearances straight to Danny Swanson and the winger's first-time drive whizzes past the near post.
That's not the kind of distribution the Scotland international will want to display should he want Chelsea to come back in for him at the end of the season.
St Johnstone 0-1 Celtic
Chris McLaughlin
BBC Sport Scotland at McDiarmid Park
"That goal was all down to the desire and tenacity of Roberts, Mackay-Steven and Henderson. All three have looked so lively in the early stages. Celtic are, once again, in the mood."
St Johnstone 0-1 Celtic
Scorer Liam Henderson threatens another goal as Liam Tierney cuts the ball back from the by-line, but the midfielder's low effort is blocked in front of goal by Tam Scobbie.
Quote MessageHe just caressed it into the top corner with his left foot. A very, very composed finish
Mark Burchill, Former Celtic striker on BBC Radio Scotland
Liam Henderson
Celtic make an early breakthrough. Goalkeeper Zander Clark had already denied Gary Mackay-Steven at the front post, but the corner results in the opening goal.
Clark can only parry Patrick Roberts' low drive and Liam Henderson makes the most of his rare start by a sublime curler into the corner of the net from 15 yards.
Image source, SNSSt Johnstone 0-0 Celtic
St Johnstone are playing Murray Davidson high up the park, almost in a twin striker role beside Graham Cummins. Meanwhile, Richard Foster has been pushed forward into the right-wing role, with Keith Watson behind, in a double full-back ploy to thwart the danger of Celtic left-back Kieran Tierney.
St Johnstone 0-0 Celtic
Saints win the first corner as Dedryck Boyata heads clear following a free-kick, but Brian Easton's volley is heading for Stirling.
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St Johnstone v Celtic
St Johnstone kick-off in Perth, where the rain has thankfully subsided for the moment.
Saints have won three of their last four games, their only defeat being that loss to Celtic in Glasgow last month.
Dedryck Boyata got the only goal that day - the only time the Saints have conceded during those four games - and the former Manchester City defender has grabbed what was a rare chance to start in the side and has kept his place since then.
St Johnstone have lost on their last three visits to Celtic Park, but they don't have to go too far back for a win there - Danny Swanson giving them a 1-0 victory in March 2015.
Image source, SNSSt Johnstone v Celtic (12:30)
The players come out on to the McDiarmid Park pitch for the final game of the Premiership weekend on a cold afternoon in Perth.