MILLWALL captain Paul Robinson will see a specialist about a groin injury that will rule him out of action for at least "the next few weeks".
Robinson underwent a double hernia operation in the summer but his rehabilitation has been hindered by a new muscle problem.
"Our physio is looking to get him to see the specialist and we'll take it from there," assistant manager Joe Gallen said.
"It doesn't look like he'll be back in the next few weeks, I think it's going to be a bit longer than that, but that's not for definite yet."
Karleigh Osborne has been struggling with a calf problem but is touch-and-go to play against Bolton on Saturday.
Osborne's return would be a timely boost for the Lions, with Shane Lowry set to serve a one-match ban against the Trotters after the Australian picked up his fifth yellow card of the season at Ashton Gate.
"Karleigh's going to be close," Gallen said. "Lowry picked up another booking so we'll see how we regroup on Thursday and Friday."