Norwich City may have to do without defender Grant Hanley for their Boxing Day trip to Birmingham after his early withdrawal against Brentford on Friday.
Hanley was replaced at half-time by Christoph Zimmermann, having suffered a knee injury in the build-up to The Bees' second goal.
Speaking to the media post-match, Head Coach Daniel Farke said: "Grant has a swollen knee and had no feeling in it at half-time.
"We hope it isn't too bad. We will see how it develops."
Cameron Jerome and Wes Hoolahan may move into contention for a place in the squad, depending on their respective recoveries from minor knocks.
Longer-term absentees Louis Thompson and Matt Jarvis remain unavailable, while James Husband and Steven Naismith have returned to full training.