Djokovic served four double faults, directed less than half of his first serves in, won only 18 per cent of the points on his second serve and racked up a whopping 16 unforced errors during a first half-hour which shocked Centre Court.

Novak Djokovic recovered from an alarming scare to book his place in the quarter-finals of Wimbledon in front of his old rival Roger Federer. Djokovic produced what John McEnroe described as ‘his worst set in years’ as Alex de Minaur won a one-sided opener 6-1 in 30 minutes.

John McEnroe was highly critical of Novak Djokovic's performance during the early stages of his Wimbledon fourth-round clash with Alex de Minaur.