LI NA RETIRES @ AGE 32:"Tennis Star Li Na Says Goodbye to the Court…and Puts the Sport’s Rise in Asia in Question" - The Daily Beast

http://www.thedailybeast.com/articles/2014/09/19/tennis-star-li-na-says-goodbye-to-the-court-and-puts-the-sport-s-rise-in-asia-in-question.html