Celtic midfielder Aiden McGeady faces up to eight weeks on the sidelines after suffering a knee injury in training on Friday.
McGeady has been in impressive form
The 20-year-old Republic of Ireland international was hurt after a collision with a team-mate.
Celtic manager Gordon Strachan told BBC Scotland: "It is not a good one - it was just unfortunate.
"He went in for a 50-50 challenge and it was a block tackle. It will be six to eight weeks, I think."