Rangers defender Krik Broadfoot has been added to Scotland's squad for the World Cup qualifiers with Macedonia and Iceland.
Broadfoot has been drafted into the squad by coach George Burley after club team-mate David Weir was forced to withdraw.
The 24-year-old's call-up could lead to Broadfoot winning his first international cap in Saturday's game with Macedonia.
Norwich goalkeeper David Marshall has also pulled out of the squad, with Aberdeen's Jamie Langfield summoned to provide cover for Craig Gordon and Allan McGregor.
Birmingham City striker Garry O'Connor had already withdrawn from the double-header on Monday due to a groin injury.
No Brown concerns
Meanwhile, Scotland chief Burley is not concerned by the form of Celtic midfielder Scott Brown ahead of the games in Macedonia and Iceland.
Burley said: "I'm not at all worried.
"Personally I think any criticism is unfair. He's holding his place at Celtic and even last season people looked at his form after a defeat.
"I was at the game on Sunday and there were some excellent performances and Scott Brown is very much in my plans."