Lee Croft is about to come on for St Johnstone, with St Johnstone striker Michael O'Halloran looking injured.

Tom and 20 others: "Well that's put a weasel amongst the woodpeckers." The woodpecker won that won, so maybe the underdog might come out on top here too.

Celtic have made two changes, with Gary Mackay-Steven and Anthony Stokes being replaced with James Forrest and Nir Bitton.

"Two goalkeepers would not have saved that one. Celtic are looking a bit weary and St Johnstone are full of energy and smelling blood. They are high energy and most of the game is being played in the Celtic half."

Steven Anderson misses a great chance to put St Johnstone two ahead. Everyone else fails to get a touch on a corner into the penalty box and the defender volleys wide when he should have hit the target.

St Johnstone goalkeeper Alan Mannus is unsighted but manages to get down to turn wide a low drive from Anthony Stokes as Celtic look to hit back immediately.

On-loan Coventry City midfielder Danny Swanson lets fly with a 25 yard drive that hits the top corner of the net to give St Johnstone a lead they have been threatening in the early stages of the second half.

Efe Ambrose fires a powerful drive at goal, but St Johnstone goalkeeper Alan Mannus holds at the second attempt.

Celtic made a change at the break, with Wakaso Mubarak coming on to replace Adam Matthews. The Ghana international has slotted into the left-back spot, with Efe Ambrose moving across to right-back.

A header from Murray Davidson takes a deflection and over the Celtic crossbar as St Johnstone win a couple of corners.

Gary Mackay-Steven fires wide as the Celtic midfielder does not get enough on his shot.

A dangerous pass back from Jason Denayer straight after the restart almost hands Steven MacLean a chance to open the scoring for St Johnstone, but Celtic clear.

Paul Black: "Interesting to see Johansen in a deeper role tonight. Attacking line-up for Celtic. Could see some goals tonight." Sorry for the delay in posting this Paul. You posted this on kick-off and hopefully your prediction is right in the second half!

Richard Wilson
BBC Scotland at Celtic Park

"Some St Johnstone players have impressed in individual cameos - Brian Easton, David Wotherspoon, Steven MacLean and Steven Anderson - and the team spent a spell pressurising the Celtic defence. The champions have not been making the most of being stronger on the flanks and are being restricted to lone-range efforts, so the game has become more even."

Dundee United fans might be interested to know that it was 28 years ago tonight that their side beat Barcelona 1-0 at Tannadice in the Uefa Cup quarter final.

Richard Wilson
BBC Scotland at Celtic Park

"Celtic have been typical bright and incisive, with Stefan Johansen still as influential in an attacking sense despite playing in a deeper role in the absence of Nir Bitton. Leigh Griffiths has been sharp, too, in his movement and shooting. At times, St Johnstone are having to defend in desperation."

St Johnstone make it to the break without conceding and have had occasional moments of threat at the other end. Much for Celtic manager Ronny Deila to ponder at half-time.

Celtic defender Virgil van Dijk heads across the face of the St Johnstone goal, but Murray Davidson nods clear for the visitors.

Shots from Virgil van Dijk and Gary Mackay-Steven are blocked in front of the St Johnstone goal amid penalty claims from the home fans.