Ulrich Le Pen and Tommy Miller both limped off as the reserves lost 1-0 to Charlton at Portman Road last night. However, the Frenchman merely has a dead-leg and will be OK for Saturday while Miller appeared to have an ankle problem.
Town's main worry ahead of the Derby game is Jim Magilton according to George Burley: "Jim is very doubtful. I have spoken to our physio, David Williams, about him and he has not been able to do anything this week."
If Magilton misses out at Pride Park then Sixto Peralta is likely to start on the right of midfield with Jermaine Wright moving to the centre.
Alun Armstrong is the only other serious worry with his neck injury sustained when he collided with a linesman last weekend.