Barry Ferguson reckons Philippe Clement has a player in his Rangers squad who can do a job for him anywhere on the pitch. Dujon Sterling has been one of the most improved players under Clement this season after hardly getting a look in under Michael Beale. The latter manager signed him on a free transfer from Chelsea in the summer and was primarily brought in as cover for James Tavernier at right-back. Of course, goal machine Tavernier’s role as Rangers captain and his ability to avoid injury for long spells meant Sterling featured in just two of the first 14 Scottish Premiership games of the …