Nottingham Forest are waiting for news on striker Nathan Tyson, who went off with a knee injury after just six minutes of their 1-0 win over Bradford.
"Right now, it looks quite a nasty one," Forest manager Colin Calderwood told his club's website.
"He's very sore at the moment, but we'll just have to wait and see the results of the scans.
"He'll certainly be missing against Blackpool on Tuesday night, and that's something we had not bargained for."
But he added: "It's all about having a group of players - Grant Holt came on early, and played a full part in the win.
"It was his cross that led to the goal."