Jeff Hendrick has had yet another injury to add to his injured thigh that kept him out of the Republic of irelands Internations last week.
The new injury happened in training on Friday and kept Henrick out of the Cardiff defeat at the weekend. Rams boss Darren Wassell said he had a little knock and now awaits results of a scan that will reveal the extent of the injury.
It is feared that Hendrick will almost certainly miss Tuesday's clash with promotion rivals Hull City at the Ipro stadium.
The Rams now need to show some steel after yet another lack luster performance from the Derby squad, returning a 2-1 defeat and both goals conceaded from set plays.