Dimitrov was leading world No 1 Jannik Sinner by two sets and was closing in on a place in the quarter-finals when injury struck

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.

Roger Federer had a front row seat to watch Novak Djokovic come back in his Round of 16 Wimbledon match vs. Alex de Minaur on Monday afternoon. Djokovic advances to his 16th Wimbledon quarterfinals with the win.