Roger Federer Predicts Winner of Novak Djokovic vs. Jannik Sinner Wimbledon Match originally appeared on Athlon Sports.

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.

After taking what Novak Djokovic called "a nasty fall" Wednesday in the final moments of a Wimbledon quarterfinal victory over No. 22 seed Flavio Cobolli, the 38-year-old Serbian star canceled his afternoon practice session Thursday.