Wolves striker Sylvan Ebanks-Blake will be out of action for a month after suffering knee ligament damage.
Ebanks-Blake sustained the problem during Wolves' Carling Cup win at Northampton on Tuesday night after scoring the second of his two goals.
Wolves boss Mick McCarthy confirmed: "The injury is worse than we first thought. Sylvan has damaged his medial ligament and you are looking at him being out for a month.''
Meanwhile, McCarthy says he is unlikely to bring in any fresh faces before the transfer window closes next week.
McCarthy said: "It is unlikely that anyone else will be coming here before the window shuts. I repeat, I am happy with the squad I've got.''
McCarthy intimated he is likely to keep faith with the side which won against Fulham last weekend for Saturday's derby at Aston Villa.
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