Jody Craddock is struggling to return to the side as Mick McCarthy has found it difficult to drop form man Richard Stearman.
Stearman has considerably improved the defensive side of his game to become a first-team regular in the battle for Barclays Premier League survival.
It means Craddock has been confined to the bench since recovering from injury.
McCarthy said: 'Jody is fit but, as much as I would like him in the team, I can't. Richard has been rock-solid.