There was little to write home about during Rangers defeat to Union Berlin but one positive was the performance of Leon King. The 20-year old has hardly be seen this season but was assured in an unfamiliar right-back role as Philippe Clement tinkered with his squad ahead of Copenhagen’s visit to Ibrox on Tuesday. Rangers know that they have a talented youngster in Leon King but with games limited in the middle of defence and defensive midfield, right-back coud be an option in the long-term. Rangers position shift for Leon King makes sense long-termJames Tavernier isn’t getting any younger. He …