Lee Bowyer revealed the injuries which cost him two of his starting three defenders are not serious.
The Birmingham City boss was forced to bring Dion Sanderson and George Friend into the side for the first time this season as Marc Roberts and Kristian Pedersen picked up knocks.
However, speaking after Saturday’s 0-0 draw with Preston, the head coach suggested both could feature in the next week or so.
“Marc was a funny one, we thought it was something to do with his stomach, he had a scan but it wasn’t his stomach it was coming from his back and round the front,” Bowyer revealed.
“I know it sounds a bit funny but I am hopeful, nothing really showed on the scan, apart from this thing around the back. So I am hopeful he will be available for Tuesday.
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“Maybe the long throw is how Robbo did his back, too many throws – and I am being serious, I think that might have played a part of it because of the rotation he did, the doc seems to think it could play a small part of it, hopefully he will be OK.”
Pedersen also missed his first game of the season.
“Kristian had a little hamstring injury and if we are lucky he might be available for Forest but again we will analyse that and won’t be taking any risks because we have got the international break after that and then another two weeks.
“The Kristian one, Wednesday-Saturday is tough. He came on and trained and felt a little bit tight, he went in after the warm-up.”Internet Explorer Channel Network