Swiss Open Gstaad 1990
Martin Jaite won the title, beating Sergi Bruguera 6–3 6–7 6–2 6–2 in the final.
Main draw 32 players
- 1🇪🇨Andres GomezRound of 16 · Lost to Ronald Agenor
- 2🇪🇸Emilio SanchezQuarterfinals · Lost to Marc Rosset
- 3🇦🇷Martin JaiteFinal · Champion
- 4🇷🇺Andrei ChesnokovQuarterfinals · Lost to Sergi Bruguera
- 5🇺🇸Jim CourierQuarterfinals · Lost to Martin Jaite
- 6🇪🇸Juan AguileraRound of 16 · Lost to Sergi Bruguera
- 7🇩🇪Carl Uwe SteebQuarterfinals · Lost to Ronald Agenor
- 8🇨🇭Marc RossetSemifinals · Lost to Sergi Bruguera
- 🇪🇸Sergi BrugueraFinal · Lost to Martin Jaite
- 🇺🇸Ronald AgenorSemifinals · Lost to Martin Jaite
- 🇧🇷Cassio MottaRound of 16 · Lost to Martin Jaite
- 🇦🇹Horst SkoffRound of 16 · Lost to Jim Courier
- 🇪🇸Jordi ArreseRound of 16 · Lost to Emilio Sanchez
- 🇨🇿Milan SrejberRound of 16 · Lost to Carl Uwe Steeb
- 🇪🇸Tomas CarbonellRound of 16 · Lost to Andrei Chesnokov
- 🇦🇺Wally MasurRound of 16 · Lost to Marc Rosset
- 🇦🇷Alberto ManciniRound of 32 · Lost to Sergi Bruguera
- 🇷🇺Andrei CherkasovRound of 32 · Lost to Andrei Chesnokov
- WC🇸🇪Christian BergstromRound of 32 · Lost to Horst Skoff
- Q🇨🇿Cyril SukRound of 32 · Lost to Juan Aguilera
- WC🇺🇸David WheatonRound of 32 · Lost to Tomas Carbonell
- Q🇦🇷Horacio De La PenaRound of 32 · Lost to Wally Masur
- 🇪🇸Javier SanchezRound of 32 · Lost to Carl Uwe Steeb
- 🇺🇸Jimmy AriasRound of 32 · Lost to Emilio Sanchez
- 🇨🇿Karel NovacekRound of 32 · Lost to Marc Rosset
- 🇧🇷Luiz MattarRound of 32 · Lost to Jordi Arrese
- Q🇭🇷Marko OstojaRound of 32 · Lost to Cassio Motta
- 🇩🇪Markus ZoeckeRound of 32 · Lost to Martin Jaite
- 🇨🇦Martin WostenholmeRound of 32 · Lost to Ronald Agenor
- WC🇮🇹Omar CamporeseRound of 32 · Lost to Milan Srejber
- Q🇮🇹Stefano PescosolidoRound of 32 · Lost to Andres Gomez
- 🇫🇷Tarik BenhabilesRound of 32 · Lost to Jim Courier