The way Celtic performed in the second half of the 2023/24 season has undoubtedly spooked rivals Rangers. The Bhoys lost just once in their final 25 matches, surging towards a league and cup double at the expense of the Ibrox side. Now one of their former captains has signalled his concerns that Celtic could significantly extend their era of dominance if his old side don’t turn up this summer. The finances involved in Celtic automatically entering next season’s expanded UEFA Champions League mean that Philippe Clement is under serious pressure to come through a difficult qualifying process. Ba…