Celtic striker Giorgos Giakoumakis has been dominated out of Sunday's Scottish Cup semi-final towards Rangers.
Ange Postecoglou confirmed at his Friday press convention that the ahead had not recovered from a hamstring harm in time to function at Hampden.
However David Turnbull, who was a health concern earlier this week, is match and accessible.
Celtic head to the nationwide stadium chasing a home Treble however should now accomplish that with out their in-form Greek star.
The lack of Giakoumakis has been softened by the return of Kyogo Furuhashi - however Postecoglou stated after final weekend's thumping win over St Johnstone that he was unlikely to begin.
And he admitted on Friday that he doesn't imagine the ahead is able to full 90 minutes.
A second-half sub's look was the Japanese star's first outing since aggravating a hamstring drawback at McDiarmid Park on Boxing Day.
Postecoglou may now draft Daizen Maeda, who has grow to be a agency followers' favorite in current weeks, into the central placing position.