Sunderland defender Carlos Cuellar will miss the next few matches according to manager Martin O'Neill.
The Spaniard had to be withdrawn at half-time of the Black Cats 1-1 draw with Liverpool on the weekend with a hamstring injury and will now be sidelined for a little while.
"Carlos Cuellar has had a hamstring problem so he will be very, very doubtful, not just for this game, but perhaps for the next couple of matches," said O'Neill ahead of Saturday's trip to West Ham United.
"So from that viewpoint it is a bit disconcerting, but these things happen and you just have to get on with it."
