Ridvan Yilmaz remains Rangers’ biggest injury sweat heading into the Old Firm derby with Celtic. But whether or not to involve the Turkish international is not the only dilemma for Philippe Clement. The Rangers manager has, admirably, got his squad absentees down to only three players should Ridvan Yilmaz recover from an international break injury to return v Celtic. But on the left-hand side the dilemma over whether to start the returning Abdallah Sima remains a real headscratcher – at least for everyone but the Belgian. The Rangers manager gave an update on his squad ahead of the Scottish Pr…