Hearts defender Callum Paterson has been called up to the Scotland squad.
He will replace Stoke full-back Phil Bardsley, who has pulled out through injury.
Gordon Strachan's side face the Republic of Ireland in a Euro 2016 qualifier on Friday, followed by a friendly with England next week.
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Crystal Palace midfielder James McArthur hurt his calf in Saturday's Premier League defeat at Manchester United, but it is unclear whether he will be fit to feature.
