If the Senegal international captain fails to recover from the calf injury he sustained at Blackburn a fortnight ago Stephen Clemence is likely to take up the midfield anchor role at the Reebok.
Elsewhere, Kenny Cunningham looks like making the starting eleven for the first time since the away game at Manchester Utd on December 28th where he suffered a hamstring injury.
Cunningham returned to training on Thursday and if he suffers no reaction to the injury will partner new signing Matthew Upson in the heart of the Blues defence.