See main article: 1985 French Open.
Mats Wilander defeated the defending champion Ivan Lendl in the final, 3–6, 6–4, 6–2, 6–2 to win the men's singles tennis title at the 1985 French Open. It was his second French Open title and fourth major singles title overall.
The seeded players are listed below. Mats Wilander is the champion; others show the round in which they were eliminated.
John McEnroe (semifinals) Jimmy Connors (semifinals)
Mats Wilander (champion) 
Andrés Gómez (third round) Anders Järryd (fourth round) Joakim Nyström (quarterfinals) Eliot Teltscher (second round)
Yannick Noah (fourth round) Aaron Krickstein (fourth round) Henrik Sundström (fourth round) Stefan Edberg (quarterfinals) Brad Gilbert (first round) Jimmy Arias (first round)