Laws claimed his lowly Championship side were favourites for the original FA Cup third round tie at Pride Park, as County prop up the Premier League.
"What Laws said was a bit insulting," said Fagan after Derby battled back from 2-0 down to force the replay.
"It was pinned up on the dressing room wall. All it does is fire us up. They will probably think they are favourites but I fancy us.
"A few Premier sides have gone out already. I imagine everyone thought we were out of it but we showed a bit of spirit which maybe we have been lacking."