Scotland will be forced to cope without James Morrison when they face Macedonia this Saturday.
The Scots are set to open their 2010 World Cup qualifying campaign this weekend with a trip to the Balkan peninsula.
George Burley's plans ahead of the contest have already been hindered by a spate of withdrawals, with six players dropping out of the initial squad.
The last thing the national boss needed was to be without another of his attacking talents ahead of a tricky contest.
The Scots are set to face soaring temperatures on their arrival in Macedonia, a situation they failed to cope with during a recent friendly against Czech Republic.
West Brom winger Morrison would have hoped to be involved at some stage of the contest having featured in all three of the Baggies' Premier League fixtures this season.
However, a knee injury picked up in last weekend's 0-0 draw at Bolton has forced him to drop out of international action.
On hearing the disappointing news Burley has added Celtic midfielder Barry Robson to his travelling party as a replacement.