It may go down in history as the first Old Firm derby to be won and lost from the substitutes’ bench.
But on a day when energy levels were being stretched to the limit of exhaustion – and maybe even beyond – the kitchen sink that Giovanni van Bronckhorst was able to throw onto the pitch at Hampden amounted to much more than Celtic were able to cope with.
In Scott Wright, Scott Arfield, Steven Davis, Glen Kamara, Leon Balogun and Fashion Sakala, the Dutchman was able to refill the tank just when it seemed impossible for Rangers to keep on moving after the marathon they put themselves through against Braga on Thursday night.