Djokovic avoids disqualification to record milestone 400th Grand Slam win

A frustrated Novak Djokovic avoided disqualification as he beat error-prone Dutchman Botic van de Zandschulp 6-3 6-4 7-6 (7-4) to reach the fourth round, as the 38-year-old continued his quest for a record 25th Grand Slam title.