Ana Ivanovic
Earnings: $7.2 million
2011 ranking: 9
2011 earning: $6 million
The former world No. 1 has bounced back after seeing her rank slip to No. 64 in 2010. She has won three tournaments over the past two years and is now ranked No. 12. Her Adidas shoe and apparel deal is one of the richest in women's tennis.