After Rangers manager Philippe Clement had gotten his feet under the desk at Ibrox, the Belgian manager made an injury pledge to supporters. The former Club Brugge boss was left aghast at what he had walked into in Glasgow, with a physically undercooked squad routinely decimated with recurring problems. Rangers have changed the medical staff and the club’s pre-season approach – Clement confirmed that ‘injury prevention work’ has been central this summer – and there was fresh optimism that change was coming to the club’s stuttering medical department. But after a tumultuous pre-season, one 90 m…