Washington, July 22 -- China's Olympic champion Zheng Qinwen has pulled out of this year's US Open tournament following an elbow surgery, the event's organisers announced today.

The sixth-ranked Zheng, two-time US Open quarterfinalist, said in a social media post last Saturday that she has undergone successful surgery on her right elbow and is now recovering.

"During recent training sessions and competitions, I have been consistently bothered by pain in my right elbow," Zheng wrote.

"Although I persisted through interventions, the impact of the pain persisted. After diagnosis by elbow specialists, they recommended to me and my team to complete minimally invasive arthroscopic surgery on the right elbow as soon as possible to thoroughl...