Brentford skipper Kevin O'Connor is facing a spell out with an ankle injury sustained in the FA Cup win over Basingstoke.
The Bees are awaiting the results of a scan to determine the extent of the damage after the long-serving midfielder was stretchered off on Saturday.
Boss Uwe Rosler told reporters after the weekend's victory: "We are expecting a long lay-off.
"When a player like Kevin does not get up straight away, you know it is not good.
"He jumped up, came back down and something has happened to make him twist his ankle."