Sep 1, 2019; Flushing, NY, USA; Novak Djokovic of Serbia rubs his shoulder during a match against Stan Wawrinka of Switzerland in the fourth round on day seven of the 2019 US Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Danielle Parhizkaran-USA TODAY Sports
NEW YORK (Reuters) – Novak Djokovic’s U.S. Open title defense came to a halt on Sunday when the Serb retired from his fourth-round match against Stan Wawrinka due to a shoulder injury.
Wawrinka was leading 6-4 7-5 2-1 when Djokovic decided he could not continue.
Reporting by Frank Pingue; Editing by Peter Rutherford
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source: reuters.com