As the title race between Celtic and Rangers continues to hot up, it will eventually go down to who has the mental strength to see this battle over the line. After surrendering a healthy lead at the top of the table in December, Celtic dropped points in back-to-back defeats to Kilmarnock and Hearts allowing Rangers to eventually climb above them at the top of the Scottish Premiership. So we are set for a really tight battle this season but it’s not one that the Celtic fans are not used to. Well, not unless you listen to former Rangers player, Lee McCulloch’s comments. When asked who he thought…