NEW YORK—For Novak Djokovic, a season that got off to a gloomy start is heading for a brilliant finish after he dismissed Juan Martin Del Potro 6-3 7-6(4) 6-3 to win the U.S. Open on Sunday and earn back-to-back Grand Slam titles.
Working his way back from elbow surgery he underwent following the Australian Open, Djokovic did not expect to feature in the Grand Slam picture this season.
