The 1985 Geneva Open was a men's tennis tournament played on outdoor clay courts that was part of the 1985 Nabisco Grand Prix.

It was played at Geneva, Switzerland from 16 September through 23 September 1985.

Third-seeded Tomáš Šmíd won the singles title.

Tomáš Šmíd defeated Mats Wilander 6–4, 6–4 Sergio Casal / Emilio Sánchez defeated Carlos Kirmayr / Cássio Motta 6–4, 4–6, 7–5