Norwich City defender Ben Chrisene will miss the rest of the season because of an ankle injury.
The 21-year-old has made 28 appearances since arriving from Aston Villa last summer on a four-year contract.
He was substituted late in Saturday's draw with Blackburn, a game which also saw Lewis Dobbin limp off with what may be a season-ending thigh injury.
Winger Dobbin, 22, is on loan from Villa, scoring twice in 10 Championship games for the Canaries, but will remain at Carrow Road for treatment.
"We have to make sure we get a little bit of inspiration from his movements and his timings, he did a lot of good stuff for us," head coach Johannes Hoff Thorup told BBC Radio Norfolk.