WIMBLEDON, England(AP) Novak Djokovic has reached the fourth round at Wimbledon by beating Mardy Fish of the United States in straight sets.

The fourth-seeded Djokovic converted his first match point with a service winner Friday to complete a 6-4, 6-4, 6-4 victory on Centre Court.

The 22-year-old Djokovic broke Fish four times and only lost serve once.

Fish reached the third round at Wimbledon for the third time, but has never advanced to the round of 16.