It was quite a heavy knock that he took and we’re not at a stage where we can risk any of them.Steve Cotterill
Davis limped off after 75 minutes against the R's, but will have a late fitness test ahead of Saturday's trip to the Stadium of Light.
“He (Davis) trained this morning but we just need to see where he is at,” said Blues boss Steve Cotterill.
“It was quite a heavy knock that he took and we’re not at a stage where we can risk any of them, so we’ll wait and see with that one.“
Meanwhile, Marc Roberts, Che Adams and Isaac Vassell remain sidelined, although full-back Carl Jenkinson has started light training as he looks to return to fitness following shoulder surgery.