Martin Atkinson has been
appointed as the Match Referee for Derby County's Sky Bet Championship
fixture at home to Sheffield United on Saturday (3pm kick-off).
Atkinson has overseen 12 games so far this season in all competitions, showing 30 yellow cards and two reds.
The Premier League official has replaced Graham Scott, who was originally due to take charge of the match.
Atkinson will be assisted by Matthew Wilkes and Shaun Hudson on the lines, whilst Darren Drysdale has been appointed as the fourth official.