Young Chris Kane receives a standing ovation from the home support as he is replaced with Michael O'Halloran. Not bad when you can bring your top scorer off the bench.

Substitute Cammy Smith shows ambition with a 30-yard drive, but the striker's shot is straight at Saints goalkeeper Alan Mannus.

Another change coming from Aberdeen, with Scotland forward David Goodwillie being replaced with 19-year-old Lawrence Shankland.

Liam Caddis replaces Lee Croft as St Johnstone manager Tommy Wright makes his first substitution.

"We should talk our game up more. I have watched some dross from that English Premier League, but this has been brilliant - one of the best games I have watched all season."

The action is end-to-end at the moment and a David Goodwillie overhead kick from a difficult angle lands on the roof of the St Johnstone net.

St Johnstone left-back Brian Easton weaves his way into the Dons penalty box, but he drags his low shot across the face of goal and wide.

Shouts for a penalty there from St Johnstone as Chris Kane rushes in on goal challenged by Andrew Considine. A bit of an ambitious call if truth be told.

Alan David Duncan: "Adam Rooney, you ginger wonder!" Indeed, a 20th goal of the season for the Irishman.

St Johnstone manager Tommy Wright said his players were fired up after Inverness full-back Carl Tremarco suggested they had given up after 70 minutes of Tuesday's defeat at Caledonian Stadium. They certainly were in determined mood, but now they face a real test of their character against a Dons side for whom a half-time substitution appears to have changed the course of the game.

Chris Kane has the chance to restore Saints' lead and cap a superb individual performance when the young striker is found by Lee Croft's cross, but he misses it completely as he attempts to power the ball home from 14 yards instead of steering it towards goal.

What a strike! Out of the blue, Aberdeen are back on level terms as Adam Rooney, who has looked so ineffectual until now, latches on to David Goodwillie's head flick and sends a 25-yard drive past the despairing fingers of goalkeeper Alan Mannus and into the far top corner.

TV replays of that Lee Croft chance suggest the winger was a yard offside. The Dons would have had grounds for complaint if that had gone in.

"The better players on the pitch have been St Johnstone players. They have put pressure on a very good Aberdeen side and have started the second half the same way as they did the first."

Lee Croft squanders a great chance to extend St Johnstone's lead as the winger races into the penalty box but fires his low drive across goal and against the face of the far post from 12 yards.

Aberdeen kick off the second half and manager Derek McInnes has already made a change, with young forward Cammy Smith replacing Willo Flood, the Irish midfielder putting in a poor performance on his return from injury.

Brighton & Hove Albion say they have agreed the signing of Israel midfielder Beram Kayal from Celtic for an undisclosed fee - subject to a successful work permit application. The 26-year-old passed a medical earlier today and will sign a two-and-half year contract until the summer of 2017 - subject to a successful work permit hearing next Wednesday.

Jack Murphy: "St Johnstone flying in with some reckless tackles. Wouldn't be surprised if Aberdeen's injury list gets longer tonight."

Alan David Duncan: "AberdeenFC looking pretty jaded so far. No spark, no energy, and fragile. Time to freshen the team up Derek?"