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.The 38-year-old started abysmally and lost the opening set in 31 minutes but eventually gained control of a cagey battle to win 1-6 6-4 6-4 6-4 to keep alive his quest for an unprecedented 25th Grand Slam title.

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.

Djokovic came under serious pressure for the first time at this Wimbledon Championships before solving the riddle to triumph 1-6, 6-4, 6-4, 6-4 and book his place in the quarter-finals