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.

LONDON -- LONDON (AP) — Novak Djokovic began expressing a heartfelt thought about returning to the semifinals at the All England Club — “It means the world to me,” he was saying, “that I’m still able, at 38, to play (in the) final stages of Wimbledon” — when the Centre Court crowd interrupted with yelling and applause.