N5. Serena Williams – Net Worth: $24.6 million
The American professional tennis player is famous all over the world. As of 3 November 2014, she is ranked as #1.
The athlete is one of the most recognized and currently the five times winner of Wimbledon title. Plus, she won the US Open title six times so far.
In her active career she has got 64 WTA tour titles, which is seventh overall highest in the Open Era.
With these kind of titles in her curriculum, is no surprise that companies like Nike, Wilson Gatorade, OPI, Tampax, Hewlett-Packard, Kraft and Puma has chosen to endorse with her.