Two-time defending champion Björn Borg defeated Vitas Gerulaitis in the final, 6–4, 6–1, 6–2 to win the men's singles tennis title at the 1980 French Open. It was his fifth French Open title and ninth major title overall. Borg did not lose a set during the tournament.

Björn Rune Borg is a Swedish former world No. 1 tennis player. Between 1974 and 1981, he became the first man in the Open Era to win 11 Grand Slam singles titles with six at the French Open and five consecutively at Wimbledon.