Cardiff City striker Robbie Fowler faces another spell on the sidelines after his injury curse struck again.
Fowler, who had only just returned to action after a hip injury, suffered suspected ankle ligament damage after a heavy challenge in training.
The Bluebirds are waiting for scan results to discover the likely length of his absence.
"It's a big blow for Robbie because he has worked hard to regain his fitness," said Cardiff manager Dave Jones.
"He has been looking good and feeling sharp in training, but these are not the best of times for him."
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Fowler was in line to make his first start for Cardiff since early November in Saturday's home Championship match with Sheffield United.
The 32-year-old returned to action in last Saturday's loss to Bristol City after missing six games while recuperating from treatment on his recurring hip injury.
His absence and Steve Thompson's suspension leaves Jones with a straight choice between Steve MacLean and Paul Parry to partner Jimmy Floyd Hasselbaink against the Blades.
"We're on a decent sort of run at the moment," Jones added. "We had a bit of a blip last week, which was a bit annoying for us.
"But it's not as if we didn't play well. We should've got something from the game. But now we're at home and this is where we want to get something.
"If we play our full potential, we can match them - we did it up there and should've come away with a win, but didn't."
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