Brendan Rodgers has confirmed James Forrest is likely to be out injured for "probably six weeks" following a knock during last weekend's Scottish League Cup final win.
Forrest was seen after the match wearing a protective boot, with the player himself admitting he was forced to carry on regardless, given his side had used all of their substitutes by that stage in the game.
Speaking ahead of Celtic's league trip to Dundee United this Sunday, the Celtic manager said: "James will probably be [out for] six weeks. He had a real bad blow on the game and to be fair for him to carry on, he showed great courage to do that.
"Sadly, we will miss him for up to that length of time."
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Rodgers also delivered a fitness update on Alistair Johnston ahead of his side's return to league action this weekend.
The Irishman said: "Ali Johnson, we just need to have an eye on as well over these next couple of days.
"If he misses out this weekend, he will be fine for the next game, but we just managed that injury that he had.
"We've had a few bugs and bits and pieces going about, so hopefully they can tidy themselves up over the next couple of days and we have most of our players available for the weekend."