The younger of the two tennis playing Williams sisters achieved the No. 1 ranking in the world in February for the sixth time in her decorated career. At 31-years-old, she became the oldest woman to ever hold the top spot. Her $45 million in career prize money is the most of any female athlete and is fourth among all tennis players, male or female. Williams has cut back her endorsement commitments in recent years, but still pitches for Nike, Wilson, Gatorade and OPI. She also has equity deals with HSN, Sleep Sheets, Mission and the Miami Dolphins. Earlier this year Venus and Serena Williams appeared in an ad for the “Do Not Disturb” feature on Apple iPhones.

courtesy of Forbes.com