Derby (30) v Chesterfield (26)
Derby boss McClaren is expected to make changes, with the likes of keeper Kelle Roos, defenders Lee Naylor and Ryan Shotton, midfielders Jeff Hendrick, Simon Dawkins and Ivan Calero and strikers Mason Bennett and Darren Bent all options.
New signings Stephen Warnock and Raul Albentosa could figure after an ankle injury and international clearance issues respectively.
Chesterfield winger Gary Roberts will be out for around six weeks with a hamstring injury - it is thought the 30-year-old’s absence will open the door for either Dan Gardner or Jay O’Shea to come back into the starting line-up.
Emmanuel Dieseruvwe drops out of the squad once more as the on-loan Sheffield Wednesday striker is ineligible.
Top scorers (all competitions): Chris Martin (Derby) 18; Eoin Doyle (Chesterfield) 22
Match odds: H 6-10 A 9-2 D 3-1
Referee: David Webb (County Durham)