A Derby County ace has admitted he’ll be having ‘sleepless nights’ ahead of the clash against Carlisle United this weekend. Paul Warne‘s side are on the verge of securing promotion to the Championship after winning a close-fought game away at Cambridge United. Three points for The Rams moved them on to 89 points, now only needing a draw on Saturday to mathematically seal a top-two finish. After a two-season absence from the second tier, Derby will be desperate to get the job done against a side who sit at the foot of the table already relegated. One player can’t wait for the final-day clash at…