Anna Kournikova's Transformation Is Seriously Stunning

Even though she never won a singles title, Anna Kournikova is one of the most recognizable faces in women's tennis. A true prodigy of the sport, Kournikova made her Grand Slam debut at age 15 and peaked at no. 8 in the WTA worldwide rankings. However, it was her endorsement deals with companies like Adidas and Berlei that truly made her a household name.