Olympic gold medalist Zheng Qinwen has pulled out of the U.S. Open two days after announcing she had arthroscopic surgery on her right elbow because of persistent pain.

(Reuters) -Olympic champion Zheng Qinwen has withdrawn from the U.S. Open as she recovers from right elbow surgery, tournament organisers announced Monday. The world number six revealed last week on Instagram that she has been struggling with "persistent pain" in her right elbow,