Novak Djokovic secured his record-breaking 14th Wimbledon semi-final appearance by defeating Flavio Cobolli in four sets. The 38-year-old Serb overcame a first-set loss to demonstrate his experience and skill.

Roger Federer has made a return to Wimbledon — but to watch, not play, tennis. The eight-time champion at the All England Club sat in the Royal Box during his former rival Novak Djokovic's four-set victory over Alex de Minaur in the fourth round Monday.

Novak Djokovic may not have the serve-and-volley chops of Roger Federer, but he threatens to eclipse him as the most accomplished player in Wimbledon history.