Concerns remain over Novak Djokovic's fitness after he cancels a scheduled practice session before his Wimbledon semi-final against Jannik Sinner.

Jannik Sinner will face Novak Djokovic in a Wimbledon semi-final on Friday, and the Italian shares John McEnroe's view about his opponent

The first time Novak Djokovic stood up and took notice of Jannik Sinner’s burgeoning talent was on the grass of the All England Club three years ago. The Italian, then just 20, stormed to a two-set lead in their quarter-final on Centre Court.

Every other day at Wimbledon has brought an opportunity to compare the greatest player in men's tennis and one of his heirs.

Novak Djokovic made the ominous decision to call off his afternoon practice session at Wimbledon on Thursday following a ‘nasty’ fall. The Serbian is set to face Jannik Sinner in the semi-finals on Friday after he slid and fell in his Wednesday’s quarter-final win over Flavio Cobolli.

Jannik Sinner has started his Wimbledon quarterfinal against Ben Shelton with a white arm sleeve over the right elbow he hurt in his previous match.