Stefanos Tsitsipas retired from his first-round match at Wimbledon after receiving an on-court medical time-out. The 24th seed called the physio in the middle of the second set and received treatment on his back. He played on but lost the second set to qualifier Valentin Royer and sat on his bench, deliberating whether to continue.

Tsitsipas has reached only one quarterfinal in his last nine Grand Slam tournaments and his hopes of playing in the U.S. Open now appear to be in jeopardy

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