Bristol City full-back Richard Foster has been called into the Scotland squad after Charlie Mulgrew became the latest defender to pull out.
Mulgrew has succumbed to the Achilles injury that kept him out of Celtic's draw against Hibernian last weekend and will miss the opening World Cup qualifier against Serbia.
Former Aberdeen captain and Rangers player Foster, 27, is uncapped.
The versatile Mulgrew joins a number of full-backs unavailable to manager
Levein called up Huddersfield left-back