Derby County are preparing to travel to Blackburn Rovers for the first game of their Championship campaign. Derby struggled for results and performances in pre-season, suffering defeats against Chesterfield, Stockport and Barnsley, but did round off their schedule with a 2-1 win over Real Valladolid. The scoreline wasn’t the only negative to come from their warm-up matches as multiple injury concerns have arisen. The injury Jake Rooney sustained on the trip to Marbella has left options incredibly light in defence while it was also confirmed that wingers Corey Blackett-Taylor and Joe Ward would…