The Rams currently lead England's second tier, but the likes of Middlesbrough, Bournemouth and Watford are all hot on their heels and concerns are starting to emerge as injuries build up at the iPro Stadium.
Derby have key players such as Chris Martin, John Eustace and George Thorne on the treatment table and the news that Darren Bent is set to join them today has not gone down well.
Bent has been ruled out for four weeks with a hamstring injury, according to a report in the Derby Telegraph, and it means that there is a question over where the goals are going to come from.
Bent has notched seven goals in 10 games for Derby since arriving on loan from Aston Villa, and with Martin also out it means that other members of their squad will have to raise their performance levels.
Derby still have the likes of Jamie Ward and Johnny Russell available to them, but both prefer to play on a wing rather than as the central striker and their title bid may hinge on how well they can perform out of position until the return of Bent.
Here is the best reaction from Derby fans on social media site Twitter to Bent's injury.
Martin out at least another week, Bent out for a month, Thorne out for 2 weeks and Eustace still 3 weeks away. Top 2 will be big ask! #DCFC— Adam J Newman (@Adam_J_Newman) March 2, 2015
By my calculations Bent will miss games against Brighton, Birmingham, Norwich, Middlesbrough and Wolves. Huge blow. #dcfcfans— Derby County Podcast (@dcfcpodcast) March 2, 2015
Gutted Bent out for a month, let's hope Russell can deliver up front #dcfc— Ryan Tizzard (@ryantizzard) March 2, 2015
Chris Martin and Darren Bent both out with hamstring injuries.. Time for players to step up to the plate. #DCFC— Samuel Ridgard (@Ridgard22) March 2, 2015
Bent, Thorne and Martin at least a few weeks away! Injuries are going to cost us aren't they? #dcfc— Nemanja Matt-ić (@FMHintsAndTips) March 2, 2015
Worried about our promotion push now. Bent will be looking at weeks. Martin, Thorne and Eustace out no striker, Omar is poor. Oh dear #dcfc— Mark TeeVee (@Mark0_dcfc) March 2, 2015
We need someone in on loan to play up front. That's my view on it #dcfc— StuartF (@sjforsyth) March 2, 2015