Ange Postecoglou has revealed that Aaron Mooy is "touch-and-go" to feature against Rangers.
The Celtic midfielder could play at Ibrox this weekend but the Celtic boss warned Mooy is "a bit sore" with some minor knocks.
However, Celtic have been boosted by the return of James Forrest who is back in training an in contention to face Rangers.
Alistair Johnston and Cameron Carter-Vickers remain out for Celtic with injury problems.
But Postecoglou insists there has been no "major" fitness concerns from last weekend's win over Hearts when Celtic sealed the league title.
Postecoglou - asked for an injury update - explained: "Nothing major from last week.
"James Forrest is available as he has been back training which is good.
"Aaron Mooy is a little bit touch-and-go for Saturday. He is just a bit sore with a couple of things and we will see how he is.
"Everyone else is fine and good to go."
On Carter-Vickers' injury, Postecoglou said after the win over Rangers at Hampden: "That's Cameron Carter-Vickers last game of the year. He's been carrying an injury for I don't know how long.
"We'll put him out to pasture for a little bit now."
And pressed on Johnston's knock against Rangers, Postecoglou said at the time: "He got a sore one for him to come off. He was waving the crutches about so he seemed alright afterwards but you know what it is like, they feel no pain at full-time.
"We will have a look at it but that is the beauty of our squad, Anthony Ralston comes in and he has not played for that long and he did a fantastic job for us. It has been a squad effort since day."
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