1989 Geneva Open
Date	11–17 September
Edition	10th
Category	Grand Prix
Draw	32S / 16D
Prize money	$190,000
Surface	Clay / outdoor
Location	Geneva, Switzerland
Champions
Singles
Marc Rosset[1]
Doubles
Andrés Gómez / Alberto Mancini[2]
← 1988 · Geneva Open · 1990 →

The 1989 Geneva Open was a men's tennis tournament played on outdoor clay courts that was part of the 1989 Nabisco Grand Prix. It was played at Geneva in Switzerland from 11 September through 17 September 1989. Marc Rosset, who entered the event on a wildcard, won the singles title

Finals

Singles

Marc Rosset defeated Guillermo Pérez Roldán 6–4, 7–5

• It was Rosset's only title of the year and the 1st of his career.

Doubles

Andrés Gómez / Alberto Mancini defeated Mansour Bahrami / Guillermo Pérez Roldán 6–3, 7–5

• It was Gómez's 4th title of the year and the 50th of his career. It was Mancini's 4th title of the year and the 6th of his career.