NEW YORK, Sept 1 Top seed Novak Djokovic roared into the fourth round of the U.S. Open with a 6-0 6-2 6-2 victory over Joao Sousa of Portugal under the lights of Arthur Ashe Stadium on Sunday.
The 26-year-old Serb, who has yet to lose a set, smacked 34 winners to just 10 for the 95th-ranked Sousa in the 100-minute rout.
Australian Open champion Djokovic faced just two service breaks, while converting eight of 13 against his opponent.
Djokovic, a 2011 winner at Flushing Meadows who fell to Andy Murray in five sets in last year's final, next faces either 43rd-ranked Marcel Granollers of Spain or 109th-ranked American wild card Tim Smyczek.
(Reporting by Larry Fine, Editing by Ian Ransom)