[citation needed] He was France's top-ranked tennis player from 1957 to 1969, and won the national title nine times in that period.

[1][4] He also won the French national doubles championship in 1957 (with Paul Rémy), 1958 (with Robert Haillet), 1961 (with Gérard Pilet), and 1966 (with François Jauffret).

[5][6] Also in 1963, he reached the finals at Wimbledon in doubles, along with partner Jean Claude Barclay.

[1] He was international veterans mixed doubles champion with his wife Rosie Darmon in 1961, and in 1968 and 1975 with Gail Chanfreau.

Darmon was a member of France's Davis Cup Team from 1956 to 1967, winning 44 of the 68 matches in which he participated.