Right-back Martin picked up a thigh injury during last weekend's 2-1 win at Coventry - as did forward Hoolahan.
Hoolahan came on as a second-half substitute at the Ricoh Arena but lasted just 14 minutes before limping off.
Leon Barnett will miss out once again after he was given an additional two-match ban for the red card he received during the 2-0 home defeat to Portsmouth at an FA Regulatory Commission hearing.
Wales midfielder Andrew Crofts is expected to return from illness and on-loan Arsenal midfielder Henri Lansbury is fit despite suffering a knock on his ankle in the challenge that earned Coventry's Aron Gunnarsson a red card.
Left-back Adam Drury and defender Zak Whitbread are close to a return after calf and hamstring injuries.
Source: PA
Source: PA