Stuart Armstrong is the latest Scotland international to have his season ended by injury and Euro 2024 availability plunged into doubt.
The midfielder was taken off on a stretcher playing for Southampton on Saturday in what manager Russell Martin described as "a bad one".
Bologna midfielder Lewis Ferguson will miss Euro 2024 squad through injury.
Two right-backs - Everton's Nathan Patterson and Brentford's Aaron Hickey - are also serious doubts.
Now midfielder Armstrong has picked up what manager Russell Martin described as "a bad one" against Cardiff City.
- Armstrong off as Southampton lose in Cardiff
- Patterson ruled out for season
- Latest Scotland national team news on BBC
Armstrong, 32, went down in pain after having a shot blocked as he attempted to secure a late equaliser in Southampton's 2-1 loss at Cardiff.