While Sinner has the upper hand on hard and clay, he has never defeated Djokovic on grass. And we have already seen the world No 1 on the receiving end of an almighty reprieve this year, given his two-set deficit to Grigor Dimitrov in the fourth round, before the Bulgarian had to agonisingly retire.

For the 14th time in his career, Novak Djokovic will stride out onto Centre Court for a Wimbledon semi-final. The 38-year-old will face world number one Jannik Sinner on Friday for a place in the final, a stage he has not failed to reach at SW17 since 2017.