Celtic stopper Artur Boruc was forced to pull out of the 4-2 defeat at Aberdeen after picking up a groin strain in the warm-up. Hoops boss Gordon Strachan is now waiting anxiously to find out the full extent of the injury.

"I have no idea how long he will be out for," said Strachan.

"He slipped when warming up. We will have to wait until the injury calms down over the next couple of days."