Wales international Sam Ricketts will be out for the rest of the season with an Achilles injury.
The Bolton Wanderers defender ruptured his Achilles tendon against Wigan Athletic on Wednesday.
Bolton manager Owen Coyle said: “Unfortunately Sam has ruptured his Achilles and he will be operated on today.
“The likelihood is that he will be missing for about six months, which is a big blow for Sam first and foremost. He has been outstanding for us and our immediate thoughts go to him as we wish for a speedy recovery.
“It was very innocuous in terms that he sustained the injury by tracking the winger. He has put his foot down and stumbled so it is very unfortunate. With the speed that the game is now played then these type of injuries can occur.
“Sam will get all the help from the club that he requires, but we will now have to get on with everything.
” As always, we will look to adjust and put a team out that is capable of winning games when we travel to Craven Cottage (to play Fulham).”