Roger Federer bested Djokovic in the opening stages of their rivalry on hard courts. The Swiss delivered a memorable win over an in-form rival in the 2011 Roland Garros semi-final and completed the circle a year later in the Wimbledon semi-final.

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

Wimbledon champion Jannik Sinner, 24-time Grand Slam title winner Novak Djokovic and No. 5-ranked Jack Draper all withdrew Sunday from the Masters 1000 tournament in Toronto that starts in a week, citing injuries.