Striker Counago suffered a hamstring strain during the 3-0 defeat by Nottingham Forest last weekend and is a doubt.
Darren Ambrose played at Forest despite a leg injury and his condition will be assessed once again, although boss George Burley is confident he will be fit.
However, fellow midfielder Alex Marrow looks set to miss out with flu.
Winger Sean Scannell has made two substitute appearances after recovering from the knee injury he suffered in pre-season and is pushing for a start.
Young defender Lee Hills is still on the sidelines with a knee problem.