The Midlands club had been relying on Ezri Konsa in the heart of their defence.
However, the 26-year-old has been out of action with a knee injury since their 6-0 win over Sheffield United.
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Konsa had started every Premier League game since Unai Emery took over before that game.
The club put out a video on social media this week, showing Konsa walking out to training.
There is also the caption Miss Me?" within the video, which references the fans' desire to see him back soon.