Boro fell two goals behind in the first half at Pride Park after goals from strikers Lee Gregory and Colin Kazim-Richards.
The visitors did manage to pull a goal back before the break through Neeskens Kebano but weren’t able to build momentum after the interval.
Neil Warnock’s side have now gone five games without a win and slipped six points adrift of the Championship play-off places.
Boro will now hope to get back to winning ways when they host Huddersfield on Tuesday – but will have to manage without new signing Yannick Bolasie.
The winger missed the Derby match with a hamstring issue and is set to be sidelined for a while.
Our Boro writer Joe Nicholson has dished out his marks from the fixture – scroll down and flick through our gallery to see them:

13. Chuba Akpom - 4
(for Assombalonga, 59) A few touches but was fairly quiet. 4 Photo: Getty Images

14. Nathanial Mendez-Laing - 5
(for Watmore, 65) Attempted a few runs which didn’t come off on his Boro debut. 5 Photo: MFC

15. Marvin Johnson - N/A
(for Kebano, 82) A late cameo on the flank. N/A Photo: Getty Images

16. Ashley Fletcher - N/A
(for Morsy, 82 Came on as Boro pushed for an equaliser. N/A Photo: Jan Kruger


