Coventry City midfielder Sammy Clingan was still suffering the effects of a virus when he was withdrawn at half-time of the Sky Blues 1-0 win at Peterborough United on Saturday.
The Ulsterman had pulled out of Northern Ireland's friendly in Albania on Wednesday night due to the virus but came back and travelled to Peterborough where he played the first half.
However, City boss Chris Coleman said to the CT: "Sammy didn't look very well at all. "He was vomiting and had no energy so we had to take him off."