When reports emerged claiming that Rangers had entered talks to sign a player recently named the best in the league in his position, you might have expected the reaction at the Ibrox-bound star’s current club to be one of trepidation. Fear, even. An atmosphere of concern surrounding a club who rank as the second-most successful in the nation’s history – 26 titles to their name – but have fallen on hard times both on and off the pitch in recent times. Levski Sofia, despite the best efforts of Rangers target Jose Cordoba, are a colossal 21 points adrift of Ludogorets at the top of the table. But…