Ilie Năstase defeated Nikola Pilić in the final, 6–3, 6–3, 6–0 to win the men's singles tennis title at the 1973 French Open.

[1] It was his second and last major singles title, after the 1972 US Open.

Năstase did not lose a set during the tournament.

Andrés Gimeno was the defending champion, but lost in the second round to Guillermo Vilas.

Ilie Năstase is the champion; others show the round in which they were eliminated.