Leeds United midfielder Andy Robinson has been ruled out for four weeks with a hamstring strain.
Robinson suffered the injury in last Sunday's shock FA Cup defeat at Histon and was replaced early in the second half.
Whites boss Gary McAllister is now expecting to be without the former Swansea City man until the New Year.
McAllister's selection problems are mounting after Jermaine Beckford suffered a hamstring injury and new signing Malcolm Christie took a knock to his ribs.
In addition to Robinson, Christie and Beckford being injured, rising star Fabian Delph will miss Saturday's game at Tranmere Rovers through suspension.