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.

[1] 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.

[2] Click on the seed number of a player to go to their draw section.