Serena Williams is the greatest female tennis player to ever lift a racquet.
She's dominated her sport in such a spectacular manner that it's made her one of the richest, most successful sports stars in America.
In 2017 alone, she earned $27 million from prize money and endorsements.
One of the major contributors to her triumphant career has been her extraordinary physique: Serena's a tall, powerful woman.
She's 5ft 9in, weighs 155lbs and can bench press 225lbs.
When she was just ten years old, she beat US men's champion Andy Roddick 6-1 when they were both junior players in Florida.
But if they had played each other again when he was Men's World No1, Roddick wouldn't just have won, he'd have annihilated her.