1925 French Championships – Men's singles

Fifth-seeded René Lacoste defeated Jean Borotra in the final, 7–5, 6–1, 6–4 to win the men's singles tennis title at the 1925 French Championships. The draw consisted of 61 players of whom 16 were seeded. This was the first time the French Championships was staged as a Grand Slam event.

Seeds
• Pat Spence (third round)

• 🇧🇪 Jean Washer (semifinals)

• 🇫🇷 Jean Borotra (final)

• 🇨🇴 Fred Restrepo (third round)

• 🇫🇷 René Lacoste (champion)

• Charles Aeschlimann (second round)

•  Nicolae Mișu (third round)

• 🇮🇳 Sydney Jacob (semifinals)

• 🇫🇷 Jacques Brugnon (third round)

• 🇫🇷 Henri Cochet (quarterfinals)

• 🇫🇷 Paul Féret (quarterfinals)

• 🇫🇷 Antoine Gentien (second round)

• 🇪🇸 Eduardo Flaquer (quarterfinals)

• 🇫🇷 Léonce Aslangul (third round)

• 🇪🇸 Raimundo Morales (third round)

• 🇫🇷 André Gobert (quarterfinals)