MATHIAS Ranegie has been sidelined for several weeks with a hamstring injury.
The striker limped out of Tuesday's defeat to Birmingham moments after he was involved in the move that led to Lee Gregory's goal.
"He played his best game but he's gone and torn a hamstring," Holloway said of the Watford loanee.
"He'll be three to four weeks. I thought he came into his own in the second half and he just needs a goal like anybody else. Our squad is going to be tested."