Novak Djokovic of Serbia has moved into the third round at the U.S. Open with a straight-sets victory over qualifier Carsten Ball of Australia.

The No. 4-seeded Djokovic, had no problems getting past the 155th-ranked Ball 6-3, 6-4, 6-4 on Thursday.

Djokovic is seeking his second Grand Slam championship after winning the Australian Open in 2008. Ball had never won a match at a major tournament until this week.

Djokovic will meet 276th-ranked Jesse Witten of the United States in the third round.

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