Thursday 18 September 2014 12:13, UK
Two-time grand slam winner Li Na is set to announce her retirement from tennis, according to reports.
The 32-year-old Chinese, who won the 2011 French Open and 2014 Australian Open singles titles, is calling time on her career due to concerns over a knee injury.
State broadcaster CCTV cites unnamed sources as saying the announcement will come on Friday, but the world No 6 has yet to comment on the reports.
CCTV said on its micro-blogging site: "According to insiders who broke the news, Li Na, who won two women's tennis grand slams, will officially announce her retirement publicly tomorrow."
Li's last message on Chinese social media website Weibo was sent on September 5, saying: "I love this job and am delighted for your encouragement, my career is the fight of my life, your encouragement is my greatest happiness."
However, Li has not played since losing in the third round at Wimbledon in June to Czech player Barbora Zahlavova Strycova.
At Wimbledon, she said that prior to the tournament she had taken a "vacation to think about what I should do in the future".
Organisers of next week's Wuhan Open, the tournament held in her home city of Wuhan, still have Li on their competitors' list.
Li's success in becoming Asia's first grand slam singles champion has made her a national sporting hero in China, with Time Magazine naming her among its 100 most influential people in the world in 2013, featuring her as the cover star.
Her off-court earnings have been vast, outweighing on-court income, with Li behind only Maria Sharapova in this year's Forbes list of highest paid female athletes.
She was estimated to have earned around £14.5m in total for the 12 months to June 2014.
