Swiss Indoors Basel 1990
John McEnroe won the title, beating Goran Ivanisevic 6–7 4–6 7–6 6–3 6–4 in the final.
Main draw 32 players
- 1🇪🇨Andres GomezRound of 32 · Lost to Jean Philippe Fleurian
- 2🇭🇷Goran IvanisevicFinal · Lost to John McEnroe
- 3🇺🇸John McEnroeFinal · Champion
- 4🇷🇺Andrei ChesnokovRound of 16 · Lost to Veli Paloheimo
- 5🇺🇸Jim CourierRound of 16 · Lost to Andrei Cherkasov
- 6🇸🇪Magnus GustafssonQuarterfinals · Lost to Veli Paloheimo
- 7🇨🇿Karel NovacekRound of 16 · Lost to Michael Stich
- 8🇨🇭Marc RossetRound of 32 · Lost to Mansour Bahrami
- Q🇺🇸Scott MelvilleSemifinals · Lost to John McEnroe
- 🇫🇮Veli PaloheimoSemifinals · Lost to Goran Ivanisevic
- 🇷🇺Andrei CherkasovQuarterfinals · Lost to John McEnroe
- 🇩🇪Michael StichQuarterfinals · Lost to Goran Ivanisevic
- 🇫🇷Yannick NoahQuarterfinals · Lost to Scott Melville
- 🇫🇷Jean Philippe FleurianRound of 16 · Lost to Scott Melville
- 🇧🇷Luiz MattarRound of 16 · Lost to Magnus Gustafsson
- WCIRIMansour BahramiRound of 16 · Lost to Yannick Noah
- WC🇸🇪Nicklas KultiRound of 16 · Lost to John McEnroe
- 🇨🇿Petr KordaRound of 16 · Lost to Goran Ivanisevic
- 🇫🇮Aki RahunenRound of 32 · Lost to Yannick Noah
- 🇷🇺Alexander VolkovRound of 32 · Lost to Goran Ivanisevic
- 🇮🇱Amos MansdorfRound of 32 · Lost to Jim Courier
- Q🇸🇪Christian BergstromRound of 32 · Lost to Nicklas Kulti
- 🇿🇦Christo Van RensburgRound of 32 · Lost to Karel Novacek
- Q🇩🇪Frank DennhardtRound of 32 · Lost to Scott Melville
- 🇿🇦Gary MullerRound of 32 · Lost to Andrei Chesnokov
- 🇵🇪Jaime YzagaRound of 32 · Lost to Petr Korda
- Q🇸🇪Jan GunnarssonRound of 32 · Lost to Luiz Mattar
- 🇺🇸Jimmy ConnorsRound of 32 · Lost to Michael Stich
- 🇸🇪Magnus LarssonRound of 32 · Lost to Andrei Cherkasov
- 🇺🇾Marcelo FilippiniRound of 32 · Lost to Veli Paloheimo
- 🇨🇿Milan SrejberRound of 32 · Lost to John McEnroe
- 🇺🇸Ronald AgenorRound of 32 · Lost to Magnus Gustafsson