TennisNovak Djokovic enters fourth round in Wimbledon, but how?MridulJuly 6, 2019July 6, 2019 by MridulJuly 6, 2019July 6, 2019 It was not a cakewalk for defending champion Novak Djokovic to enter the fourth round at 2019 Wimbledon, as the World No. 1 was given