Todd Cantwell chased back 40 yards to his own byeline to cover Alexandro Bernabei.
Having kept tabs on the Argentine and snuffed out the danger in first-half injury time, he then knocked the ball off the Celtic full-back and out for a goal kick. When play restarted, he hustled Reo Hatate to halt his forward momentum. Seconds later, he was in and around the ankles of Matt O’Riley doing the same. For the third goal, it was Cantwell who hounded out the Hoops mishap that led to Fashion Sakala racing clear before rounding Joe Hart to seal the deal.
Once more, he was back at a byeline – opposite end – clearing up as his own full-back Ridvan Yilmaz hit the deck at his feet. Forget the alert and lively movement to start and finish at the opening goal, the drag backs, neat touches and the two strikes Hart saved after the interval. It was that industry and desire which stood Cantwell out as much as his ability. This was a day when Rangers had to show something, to themselves as much as anyone, for next season.