straight to your inbox every day, freeManchester United have six defenders on their transfer shortlist for next summer - according to reports.United intended to strengthen their centre-back department during the recently closed transfer window but were unable to offload fringe defenders such as Marcos Rojo and Phil Jones.The Reds are expected to assess their options at the back next summer with a defender believed to be high on Ole Gunnar Solskjaer's wish list.90min report Villarreal defender