The pair both suffered hamstring injuries during last weekend's 2-2 FA Cup third round draw at Bolton and will be missing for several weeks.
Central defender John O'Shea (also hamstring) and striker Stephane Sessegnon (ankle) both missed the game at the Reebok Stadium and have returned to light training - but O'Shea in particular remains a doubt, and new signing Alfred N'Diaye will be included if his international clearance comes through in time.
