She’s the first and only female tennis player to have won $50 million in prize money, she’s won 32 Grand Slam titles (17 in singles, 13 in doubles with sister Venus, and two in mixed doubles), four Olympic gold medals, and a reputation as one of the greatest tennis players to have ever held a racket. At 32 years of age, Serena is showing no signs of slowing down, as she remains the world’s number one by a landslide. Among other off-court endeavours, she also boasts endorsements with Nike, Gatorade, and Wilson Sporting Goods.