Gian Piero Ventrone was Antonio Conte's fitness guru with a fearsome reputation charged with turning the Italian's Juventus and Tottenham players into the fittest and most resilient in Europe.
Ventrone was dubbed The Marine when he worked at Juventus, where he would pump Ride of the Valkyries out of loud speakers as his players ran, and installed a 'bell of shame' to be tolled by the first to drop out.
This summer, his methods were brought back into the spotlight when, in 30-degree heat and 70 per cent humidity in Seoul, his trademark drill - 42 lengths of the pitch covered at a good lick with minimal recovery time - created a scene of devastation.