Veteran goalkeeper Maik Taylor has been forced to pull out of the Northern Ireland squad due to a shoulder injury.
Taylor has recently been sidelined by a knee problem he picked up during Birmingham City's FA Cup tie against Millwall in early January.
However, the 39-year-old has now hurt his shoulder and will be unavailable for his country's Euro 2012 qualifiers against Serbia and Slovenia.
His absence could see Nottingham Forest keeper Lee Camp make his Northern Ireland debut against Serbia in Belgrade on Friday.
Camp has switched allegiances to Northern Ireland after previously representing England Under 21s and will vie with Jonathan Tuffey to start against Serbia.
Nigel Worthington's side had beaten Slovenia and drawn with Italy in their opening two qualifiers, but were held to a disappointing 1-1 draw by the Faroe Islands in their last competitive fixture.