Nottingham Forest are waiting to discover the full extent of the knee injury Chris Cohen suffered against Burnley.
The Reds fear their skipper could be ruled out for the remainder of the season but scans have yet to determine the severity of the problem.
The versatile 26-year-old limped off in the closing stages of Saturday's 1-1 draw with Sky Bet Championship leaders Burnley at the City Ground.
He tried to carry on initially, but ultimately departed down the tunnel, reducing Forest to 10 men during injury time as Reds boss Billy Davies had used all three of his substitutes.
"Cohen has a knee issue, we will know more about it when we have had a look at it. It is the same knee he had a problem with before," said Davies, who also lost full-back Eric Lichaj to injury against the Clarets.
Forest already had limited options in defence ahead of the weekend with Danny Collins (ankle), Kelvin Wilson (back) and Greg Halford (calf) also on the injury list.
Davies will attempt to bring in a defender before the loan window closes on Thursday.
"I have tried (to bring in players on loan) over the last couple of days. We have made several enquiries. Unfortunately, at the moment, nothing is happening," said the Scot.
"But we will keep looking at things. We will do the best that we can.
"It depends on Cohen and Lichaj and what the situation is with them. We will look to add a little bit of depth to the squad.
"It is unusual having these injuries (in one area of the pitch), but that is football. There is nothing we can do about it."