Crystal Peaks (sorry! Palace) was due to play last Wednesday at Southampton, but saw their game postponed due to a water logged pitch.
The London club are expected to be without star striking due's Andrew Johnson (knee) and former Manchester City man Jonathan Macken (hamstring).
Keeper Gabor Kiraly should feature after recovering from an chest injury whilst Mikele Leigertwood (ankle) and Tony Popovic (calf) both return from injury.
Possible Eagles Line-Up: Gabor Kiraly, Mikele Leigertwood, Emmerson Boyce, Fitz Hall, Danny Butterfield, Michael Hughes, Marco Reich, Aki Riihilahti, Tom Soaras, Dougie Freedman, Clinton Morrison.
Midfielder Phil Jagielka netted a brace as the Blades beat Luton Town 4-0, club captain Chris Morgan headed in United's second whilst substitute striker Vincent Pericard also scored on the night.
Blades manager Neil Warnock has no new injury or suspension worries ahead of the trip to the Capital.
However United will be without Defenders Robert Kozluk (hamstring) and veteran Craig Short (ankle).
Upfront the Blades will see a selection problem, it is highly likely that former Palace strikers Steven Kabba and Neil Shipperley but Danny Webber and Vincent Pericard could be called upon.
Possible Blades Line-Up: Paddy Kenny, Leigh Bromby, Chris Morgan, David Unsworth, Alan Wright, Paul Ifill, Phil Jagielka, Nick Montgomery, Alan Quinn, Steven Kabba,