Cameron Carter Vickers is set to be sidelined for three to four months as he recovers from knee surgery.
The Celtic centre-back's season is officially over following Sunday's 1-0 victory over Rangers in the semi-finals of the Scottish Cup.
The defender will finally go under the knife to fix an injury issue that has been bothering the 25-year-old.
Given the timeline for recovery the American international is rated doubtful for the 2023/24 season opener - which takes place on August 4.
After Sunday's win over the Light Blues, Celtic boss Ange Postecoglou said: "He hasn't put a foot wrong since we signed him. He has been outstanding. Him and Carl (Starfelt) as a partnership have lost once domestically.
"That is his last game for us this season. He will get his injury looked at now and that will be him until the end of the season. He wanted to play (against Rangers) and I pushed for him to have it done earlier.
"It's hard but I'm scared of him so I just let him do what he wants. He was keen on playing and he put in a performance that befits his standing at put football club and it's a credit to him."
READ MORE: Celtic announce summer showdown against Wolves in South Korea
Meanwhile, the Hoops have announced their first pre-season fixture with English Premier League side Wolverhampton Wanderers providing the opposition at the Suwon World Cup Stadium in South Korea as part of their summer tour of Asia.
The game will take place on July 26 and will see Korean striker, Oh Hyeon-gyu, face-off against his fellow countryman, Hwang Hee Chan, who plays for the English Premier League side, and who was a member of South Korea's World Cup squad in Qatar last year.
It will also be an emotional return for Oh to his old stomping ground as he previously turned out for Suwon Samsung Bluewings.
Finally Celtic U-18s are in action in the Youth Cup final against Rangers at Hampden tonight Stuart McLaren's young Hoops have defeated Dundee, Deveronvale, Dunfermline and St Johnstone scoring 21 goals and conceding just once in the lead up to the final.
Join Tony Haggerty and Ryan McGinlay in the video below as they discuss all the latest Celtic news.
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