Park back for Hornets
Park Chu-young is expected to return for Watford's home clash against Birmingham.
The on-loan Arsenal forward was struggling with a knee injury at the weekend and missed Watford's 2-2 draw at Championship leaders Leicester, with the Hornets throwing away a two-goal lead for the third time in four games.
Midfielder Samba Diakite, on loan from QPR, also sat out at the King Power Stadium due to a calf complaint but he is unlikely to return in time to face Blues.
Lewis McGugan (thigh), Almen Abdi (foot) and long-term absentee Essaid Belkalem (ankle) also remain on the sidelines, with the latter returning to light training.
Mitch Hancox returns to contention for the trip as Birmingham target back-to-back league wins for the first time this season.
The left-back has missed the last three matches due to an ankle injury but faces a battle to regain his place with Blues having taken an impressive four points from their last two matches.
Manager Lee Clark must decide whether to stick with the same XI which started Saturday's 2-0 victory at Charlton or freshen things up with a couple of changes.
Tom Thorpe (ankle), David Murphy, Matt Green, Neal Eardley (all knee), Akwasi Asante (hamstring) and Jonathan Spector (thigh) all remain unavailable, although the latter is closing in on his comeback.