NEW YORK: Novak Djokovic has ended his U.S. Open title defense by retiring from his fourth-round match against Stan Wawrinka.
Djokovic was seeded No. 1 and seeking a fourth championship in New York.
But he’s been troubled by a painful left shoulder and did not look to be close to his best for much of the night against Wawrinka.
Djokovic was trailing 6-4, 7-5, 2-1 when he quit.
(Agencies)
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