This burst of energy is all the more astonishing as the Serb was assured of his place in the last four even before playing the match, thanks to his two victories against Stefanos Tsitsipas and Andrey Rublev.
The latter compete from 9 p.m. to clinch second place in the qualifying group for the semi-finals.
And stranger still, Djokovic knew before starting his match against Medvedev that he would play his semi-final the next day against Taylor Fritz who qualified on Thursday and had a day off.
Djokovic, currently ranked 8th in the world after a season truncated by his refusal of the anti-covid vaccine, is the only player who can still win the tournament having had plenty of victories.
He would thus pocket the record gain on the ATP circuit of 4,740,300 dollars, at stake this year in Turin.
Above all, he is aiming for a sixth title in the Masters tournament to equal Roger Federer's record and a second big title this year, after Wimbledon, to show the emerging generation that at 35 he is still formidable.