Coventry City midfielder Sammy Clingan pulled out of Northern ireland team for tonight against Serbia in Belfast.
Clingan was named in the starting line up but withdrew before kick off.
It is understood that he had an illness and was replaced in the Northern Ireland midfield is filled by Corey for the match that Northern Ireland lost 1-0.
Whether he will miss Northern Ireland's next European Championship game in Estonia on Tuesday, has not been announced.