Rangers head coach Danny Rohl says there’s real belief in his side ahead of the Old Firm semi-final against Celtic on Sunday. The teams meet at Hampden in the last four of the Premier Sports Cup with both having suffered difficult starts to the season and seen managerial changes after just a few months. Rohl has only been in charge for three games since being appointed as successor to Russell Martin but has delivered back-to-back wins over Hibernian and Kilmarnock in the Premiership. Now the for