Rangers boss Danny Rohl addresses calls to sign more Scottish players, transfer window plans and return to Celtic ParkAs Rangers trudged off the Tynecastle pitch dazed and defeated after seeing their Scottish Premiership title prospect evaporate against leaders Hearts, one major cause for concern immediately struck an Ibrox luminary. Monday’s 2-1 defeat in the capital left Rangers with a mountain to climb in the race for silverware. In the eyes of many, there race is already run with three games still outstanding. As the post-mortem got underway, the club’s all-time record goalscorer Ally McCoist flagged that head coach Danny Rohl used 16 players across the 90 minutes, none of whom were Scottish. A critical McCoist believes retaining a strong Scottish core is important for a club of Rangers’ size and stature, having starred in teams of years gone by which always had one.Rangers’ James Tavernier, Nicolas Raskin and Bojan Miovski at full time after the 2-1 defeat by Hearts at Tynecastle. (Photo by Craig Foy / SNS Group)…