The Latest: Djokovic out of US Open after retiring in match

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              Wang Qiang, of China, reacts after defeating Fiona Ferro, of France, during round three of the US Open tennis championships Friday, Aug. 30, 2019, in New York. (AP Photo/Eduardo Munoz Alvarez)
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NEW YORK (AP) — The Latest on the U.S. Open tennis tournament (all times local):

10:50 p.m.

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.