The forward, on loan from Aston Villa, has been in fine form but has implied the club will need Martin back fit and ready before the end of the campaign.
“Chrissy has done fantastically well and I knew all about him before I came here - He’s having a fantastic season, so it’s a blow to have lost him at Bournemouth,” he said.
“Hopefully, he’ll be back sooner rather than later, because we’ll need him.”
Martin picked up a hamstring problem during the 2-2 draw at Bournemouth earlier this week.
He’s scored 16 goals from 30 appearances this season, which shows he’s been consistent and is well suited to Championship football.
He’s been keeping Bent out of the starting line-up and Derby boss Steve McClaren may have been toying with the idea of starting the pair together in the near future.
Derby are in great shape in terms of potential promotion into the Premier League and while it’s unclear how long Martin will be out of action for, his return will definitely give Derby’s attack a boost.
Bent now has a tremendous level of responsibility in terms of taking the burden of the pressure in attack.
Three goals at the club so far suggests he’s off to a good start and he needs to play smart and sensible football to stay fit and remain effective leading the Rams attack.