SNS GroupScott McTominay and Kieran Tierney have dropped out of the Scotland squad for the game against Liechtenstein.
The pair picked up injuries in the 3-1 defeat to Iceland at Hampden on Friday night.
As a result, they haven’t made the trip to Vaduz where the national team are in action on Monday.
Steve Clarke has also called goalkeepers Ross Doohan and Callan McKenna after losing Angus Gunn and Robby McCrorie.
Aberdeen stopper Doohann and Bournemouth’s McKenna are both included in the Scotland squad for the first time.
Doohan was on a family trip to Turkey after being part of the Dons’ Scottish Cup-winning squad, but took a detour to Liechtenstein after being called up at the weekend.
With Craig Gordon, Liam Kelly, and Zander Clark also unavailable through injury, Clarke has turned to the 27-year-old for experienced cover.
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