Doncaster defender Pascal Chimbonda is facing up to a month on the sidelines with a hip injury.
The French full-back has torn a ligament in his hip flexor and will be unable to play again until the end of the year.
Rovers are hoping he will be involved at some point over the busy festive period, with his experience vital to their cause.
Doncaster looked entirely unconvincing in a 2-0 defeat to Barnsley on Saturday and manager Dean Saunders admits his side missed Chimbonda's reassuring presence at the back.
"It's a big blow because he's a class player and we missed him at Barnsely," he told the club's official website.
"Hopefully he'll be back for some of the games over the Christmas period."
Rovers have moved quickly to cover the loss of Chimbonda, with Habib Beye set to fill in at right-back following his arrival on a three-month loan from Aston Villa.
He is expected to go straight into the side for a weekend meeting with Watford.
One man who is unlikely to make that contest is Herita Ilunga, as he is nursing a foot problem.
The Congo international will require a period of rest, but x-rays have eased fears that he suffered a broken toe against the Tykes.