Claudio Reyna is also a doubt after coming off before half-time on Thursday with a hamstring injury.
Paul Bosvelt replaced the American against Groclin and should come into the centre of midfield today.
However, Kevin Keegan may want to go with Joey Barton and Steve McManaman - who failed to impress on the left in the week - as his centre pairing. That would leave Antoine Sibierski and Sinclair, if fit, filling the wide midfield slots.
City will welcome back legend Paul Dickov, who plays against his former club for the first time since his move to Leiciester 21 months ago. The striker has bagged 5 goals for the Foxes so far this term.