Dundee goalkeeper Scott Bain has had to pull out of the Scotland squad for the friendlies against Italy and France, it has been reported.
No reason for the withdrawal has yet been given.
Swansea left-back Stephen Kingsley is among four players drafted in.
Derby midfielder Craig Bryson and goalkeepers Scott Fox and Jack Hamilton have also been called up.
Hull players Allan McGregor, Andy Robertson, Robert Snodgrass and Shaun Maloney, plus Sheffield Wednesday midfielder Barry Bannan, have had to withdraw after getting to the Sky Bet Championship play-off final.