Former Rangers captain Barry Ferguson would’ve relished the opportunity to go toe-to-toe with Callum McGregor at Celtic Park. The legendary Ibrox treble-winner was a force to be reckoned with on Old Firm derby day in Glasgow and made his reputation in these special matches. Both an energetic, physical midfield presence and a match winner with unarguable quality, Barry Ferguson was one of the best Scottish midfielders of his generation. In fact, Baz was (probably) the best Scottish player of his generation, period. But whilst the Rangers legend will be watching on from home and not in the middl…