The US Open begins today (Aug. 31), and Serena Williams has a chance to make tennis history. A win would put her at 22 career Grand Slam titles, tying Steffi Graf for second most, behind only Margaret Court. Her skill prompts arguments that she is the sport’s greatest female player of all-time, and currently the most dominant US athlete, of any sex or sport. Katrina Adams, the president of the US Tennis Association, recently opined that Williams is the greatest athlete ever—period.
Not everyone will agree on each of those points, particularly that last one, but there’s no disputing that Williams has been among the top handful of athletes on the planet for years now. Yet, on Forbes’ list of the highest-paid athletes, Williams ranks 47th. Of the seven tennis players on the list, she ranks last in endorsement dollars, with $13 million.
The top-earning male player, Roger Federer, will bring in an estimated $58 million in endorsements this year. The number-four ranked men’s player, Kei Nishikori, also brings in more than Williams, as does Maria Sharapova, who will rake in $10 million more yet hasn’t been a genuine rival to Williams for years. This gap has no logical explanation, except for long-held prejudices about female sports stars and how people feel they should look.