NEW YORK (AP) — For the second contest in a row at this U.S. Open, Novak Djokovic appeared a bit sluggish, a bit off, for a stretch. This time, he even dropped the opening set. And then, as always at Flushing Meadows, the 24-time Grand Slam champion progressed to the third round.

improved to 36-0 across the first and second rounds in New York, a place he's won four championships, by coming back to beat 145th-ranked American qualifier Zachary Svajda 6-7 (5), 6-3, 6-3, 6-1 at on Wednesday.

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