With Roger Federer, an eight-time Wimbledon winner, sitting in the front row of the Royal Box, so little went right at the outset for the 38-year-old Djokovic on the grass below during a breezy afternoon with the temperature in the 60s Fahrenheit (teens Celsius), a week after matches were contested in record-breaking heat.

Novak Djokovic reached the Wimbledon quarter-finals for the 16th time but it proved a hard day's work at his Centre Court office as he ground past Australian Alex de Minaur on Monday.

Novak Djokovic may never quite know how he came through on Centre Court against Alex De Minaur, but the beauty of Grand Slam tennis is that he doesn’t need to know. His mind switches immediately to the Wimbledon quarter-finals, which he has reached for the 16th time.