By Martyn HermanLONDON (Reuters) -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 has overcame an uncharacteristically unsteady start to avoid what would have been his earliest exit at Wimbledon since 2016.

Things looked shaky early, but Novak Djokovic eventually found his form in a fourth round win over Alex de Minaur at Wimbledon on Monday. After dropping the first game 6-1, Djokovic rallied to win the next three sets 6-4, 6-4, 6-4 to advance to the quarterfinals.