The 1989 Rado Swiss Open, also known as the Suisse Open Gstaad, was a men's tennis tournament held on outdoor clay courts in Gstaad, Switzerland that was part of the 1989 Nabisco Grand Prix. It was the 44th edition of the tournament and was held from 10 July until 16 July 1989. Eighth-seeded Carl-Uwe Steeb won the singles title.[3]