The former Watford man picked up an hamstring strain which caused him to lose his place in the starting XI. The Blades medical staff will check his fitness before they travel down to London.
Darius Henderson who made a short substitute appearance against Reading is available for selection again after the injury he picked up whilst training.
Derek Geary whom has been out of favour for some time now is a long term absentee. Ugo Ehiogu will serve his second game ban in the three he must sit out for.
Zheng Zhi will miss the game with a foot injury while Jonathan Fortune is likely to be sidelined. Andy Gray will play up front against his former club.