Overview

• Borg first reached No. 1 on 23 August 1977 at age 21 for a single week, seven weeks after defeating Jimmy Connors in the Wimbledon final.
• That week snapped Connors’s 160-week hold on the top spot and preceded his return for another 84 weeks.
• Borg became the fourth player to lead the PIF ATP Rankings after their 1973 launch, following Ilie Nastase, John Newcombe and Connors.
• The Swede’s baseline game and two‑handed backhand, shared with rival Connors, helped drive a stylistic shift away from serve‑and‑volley play.
• He won 12 titles in 1977 and 13 in 1979, finished year‑end No. 1 in 1979 and 1980, totaled 109 weeks at No. 1, and later ceded and reclaimed the top spot during battles with John McEnroe before Ivan Lendl ended the Borg‑Connors‑McEnroe No. 1 monopoly in 1983, when Borg retired at 26.