Björn Rune Borg is a Swedish former professional tennis player. He was ranked as the world No. 1 in men's singles by the Association of Tennis Professionals (ATP) for 109 weeks. Borg won 66 singles titles during his career, including eleven majors: six at the French Open and five consecutively at Wimbledon. Borg was ATP Player of the Year from 1976 to 1980, the year-end No. 1 in the ATP rankings in 1979 and 1980, and the ITF World Champion from 1978 to 1980.