Li Na may not be as widely recognizable in the states as Venus, Serena, or even Sharapova, but the Chinese tennis sensation is a truly global star: she has lucrative deals with Babolat, Rolex, Taikang Insurance, Yili Dairy Group, Kunlun Mountain Mineral Water and Qidongli Energy drink that total some $15 million. And she’s a force on the court, where, in 2013, she was third in tour winnings behind Sharapova and Azarenka.