As Jannik Sinner pursues a fourth Grand Slam, he'll have somewhat of a physical limitation at Wimbledon. The Italian tennis star and world No. 1 is wearing a sleeve over his right arm for his quarterfinals matchup against Ben Shelton, a result of an injury he sustained in the last round.

Djokovic, who also becomes the oldest men’s semi-finalist since Ken Rosewall in 1974, has a good relationship with Cobolli, the young Italian even hitting with the Serbian’s 10-year-old son Stefan at the practice courts earlier this week.

The 38-year-old overcame a first-set loss to take a 6-7, 6-2, 7-5, 6-4 victory over Italian Flavio Cobolli to advance to the semifinals for the 14th time at the All England Lawn Tennis & Croquet Club. Djokovic has now reached the final four at Wimbledon more than any other men's tennis player, surpassing Roger Federer on Wednesday.