Wolves midfielder Adlene Guedioura is to see a specialist to determine the extent of his ankle problem.
Guedioura, 25, suffered the setback when on African Nations Cup qualifying duty for his country last month, having missed six months of last season with a broken leg.
The Algerian has been unable to feature in any of Wolves' three pre-season friendlies to date, against Crewe, Walsall and Notts County.
Wolves boss Mick McCarthy said: ''Adlene is seeing a specialist about his ankle. We hope it is not too serious.''