A 22-time Grand Slam champion and one of the greatest tennis players of all-time, Steffi Graf celebrates her 51st birthday on June 14, 2020 (Sunday). Her versatility, footwork and a rocket forehand drive made Graff the only tennis player to win at least four Grand Slam titles on each major tennis surface. Her count of majors is also second-best among women in the modern era and third in all-time records