On-loan Lincoln City defender Gavin Hoyte will miss the remainder of the season with a serious knee injury.
The 20-year-old, on loan from Arsenal, has been ruled out for six months after damaging anterior cruciate and medial ligaments in the recent home defeat to Chesterfield.
"It is a body blow to us. We were starting to get some continuity but Gavin will be out for a long time," said City manager Steve Tilson.
"But he is a young lad, he will recover and he has a fantastic attitude, so I am sure he will be back."
Hoyte had made 15 appearances for the League Two club since arriving at Sincil Bank in October.