The Swedish former world No. 1 tennis player is quite often considered to be one of the greatest in tennis history. From 1974 to 1981 he was the first male professional to win 11 Grand Slam open era singles titles, six at the French Open and five consecutive at Wimbledon. He also won three year-end championships and 15 Grand Prix Super Series titles. As a teenage all start at the start of his career, his stardom and consistent success helped launch the popularity of tennis during the 1970s. In his career, he made millions in endorsements. But the constant attention and pressure caused him to crash and burn because he retired when he was only 26.