Derby County are set for their penultimate friendly of their pre-season schedule, travelling to Barnsley on Wednesday evening. The Rams have endured a tough summer so far, facing off against Matlock Town, Academico de Viseu, Stockport County, Chesterfield and Shrewsbury Town. A mixed bag of performances and results have followed for Paul Warne, who is focused on building fitness into his squad. However, with just over one week until the Championship campaign begins, it’s time for Derby to take it up a notch. They will be doing so against League One side Barnsley, with a trip to Oakwell planned…