Lomas faces defensive crisis
St Johnstone boss Steve Lomas will ask David McCracken if he is ready to return from his fractured cheekbone as Saints face an injury crisis.
Steven Anderson's red card at St Mirren last week rules him out, while fellow centre-back Frazer Wright will also miss the game after going over the penalty-points threshold.
Skipper Dave Mackay still has one match to go of a two-game ban, while midfielder Chris Millar is also banned after being red carded in the 1-1 draw against the Buddies.
McCracken had to have surgery after picking up the injury when he clashed heads with Celtic midfielder Victor Wanyama during the 1-1 draw at Parkhead on November 11.
The former Dundee United stopper was expected to be out for six weeks but Lomas said: "We will have a chat about it.
"David has been training non-contact for a while but I won't be taking a chance on him.
"I wouldn't do anything like that, we will take advice from the doctor."