Celtic boss Gordon Strachan is unsure how long Artur Boruc will be sidelined for after he was forced to miss Sunday's SPL clash with Aberdeen.
Boruc was forced to pull out of the 4-2 defeat at Pittodrie after picking up a groin strain in the warm-up.
Mark Brown replaced Boruc in the starting line-up and Strachan is 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."