"They seemed to run faster, further and harder," he said after the 3-0 defeat which continued Forest's long unbeaten run.
"We were outplayed, outfought and out-thought."
A textbook away performance from Billy Davies' side sets them up nicely for Sunday's FA Cup trip to Sheffield United and two huge Championship clashes against the sides currently occupying the top two places in the table in Leicester City and Burnley.