The 37-year-old showed killer instinct against younger rival, a willingness to go to hell and back in pursuit of glory

In the most recent late-night exhibition of his insatiable resilience and desire, as he again belied his ageing body to deliver another legendary performance, one of the most significant moments of Novak Djokovic’s quarter-final defeat of Carlos Alcaraz at the Australian Open came as the Serb clung on desperately to his frail momentum.

With a set point on his serve at 5-3 in the third set, Djokovic was hurled around the court by Alcaraz, chasing down a drop shot before stumbling back to the baseline in pursuit of a lob. The frantic point – and set – ended with Djokovic slipping an angled backhand passing shot by Alcaraz before cupping his hands to his ear while the Rod Laver Arena erupted.