Nigel Pearson has confirmed Ayman Benarous will face a lengthy spell on the sidelines after rupturing his ACL in training.
The young midfielder played the full 90 minutes in the Under-23s victory over Coventry on Tuesday but was left out of the matchday squad for City's final game of the season at Huddersfield.
Benarous, 18, has featured in the last three league matches making seven starts and a further four substitute appearances throughout the season. City are hopeful that the starlet will be back in action around Christmas.