Naomi racked up $37 million in earnings in the past year, more than any other female athlete in history, according to Forbes. Her earnings comes from prize money and endorsements, $1.4 million more than Serena earned, setting an all-time earnings record for a female athlete in a single year. Another tennis player, Maria Sharapova, previously held the record with $29.7 million in 2015. Naomi ranks No. 29 among Forbes’ highest-paid athletes while Serena ranks No. 33.