It has worked, though. Murray has got where he is today through the arduous pursuit of scientific instruction. Physically, he is an entirely different beast from the lanky teenager who first showed so much promise. In his early days at Wimbledon the arrival of a fifth set would see him crumble. Then he was put through a regimen of body-enhancement that means he can now, without a break, do 26 successive pull‑ups to a bar, palms facing outwards, arms fully extended (try doing that at home and see if you can manage one). On Wednesday, his gym-strengthened, fully hydrated body was so honed by preparation that in the fifth set he had sufficient reserves of energy to fling himself around court like a Caledonian superman.