7. Caroline Wozniacki, Denmark

Total earnings: $13.6 million

Prize money: $2.6 million

Endorsements: $11 million

Wozniacki kicked off a new Adidas deal this year that is one of the most lucrative in the sport. Her drop in ranking to a recent No 10 in the world has cost her bonus money, but she still maintains a rich endorsement portfolio of 10 companies. In addition to tennis, Wozniacki stays in the headlines via her relationship with golfer Rory McIlroy.

Caroline Wozniacki of Denmark reacts as she plays Bojana Jovanovski of Serbia in their women's singles match during the French Open tennis tournament at the Roland Garros stadium in Paris, May 29, 2013. [Photo/Agencies]