| Singles | |
|---|---|
| 1990 Geneva Open | |
| Champion |  Horst Skoff |
| Runner-up |  Sergi Bruguera |
| Score | 7–6(10–8), 7–6(7–4) |
| Draw | 32 |
| Seeds | 8 |
Marc Rosset was the defending champion, but lost in the semifinals this year.
Horst Skoff won the title, defeating Sergi Bruguera 7–6(10–8), 7–6(7–4) in the final.
Henri Leconte (quarterfinals) Horst Skoff (champion)
Jakob Hlasek (second round) Marc Rosset (semifinals)
Omar Camporese (quarterfinals) Sergi Bruguera (final)
Goran Prpić (first round)
Franco Davín (second round)| Semifinals | Final | ||||||||||||
 Michael Tauson | 1 | 2 | |||||||||||
| 6 | Sergi Bruguera | 6 | 6 | ||||||||||
| 6 | Sergi Bruguera | 68 | 64 | ||||||||||
| 2 | Horst Skoff | 710 | 77 | ||||||||||
| 4 | Marc Rosset | 6 | 3 | 2 | |||||||||
| 2 | Horst Skoff | 4 | 6 | 6 | |||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1/WC | H Leconte | 6 | 6 | ||||||||||||||||||||||||
 J Cunha-Silva | 3 | 4 | 1/WC | H Leconte | 6 | 6 | |||||||||||||||||||||
 L Jönsson | 5 | 6 | 6 | L Jönsson | 1 | 2 | |||||||||||||||||||||
| D Engel | 7 | 3 | 2 | 1/WC | H Leconte | 4 | 3 | ||||||||||||||||||||
| N Kulti | 4 | 3 | M Tauson | 6 | 6 | ||||||||||||||||||||||
| M Tauson | 6 | 6 | M Tauson | 6 | 6 | ||||||||||||||||||||||
| WC | C Mezzadri | 7 | 6 | 1 | 8 | F Davín | 3 | 4 | |||||||||||||||||||
| 8 | F Davín | 5 | 7 | 6 | M Tauson | 1 | 2 | ||||||||||||||||||||
| 3 | J Hlasek | 6 | 6 | 6 | S Bruguera | 6 | 6 | ||||||||||||||||||||
 M Střelba | 4 | 3 | 3 | J Hlasek | 4 | 2 | |||||||||||||||||||||
| Q | D Orsanic | 5 | 6 | 2 | WC | H de la Peña | 6 | 6 | |||||||||||||||||||
| WC | H de la Peña | 7 | 2 | 6 | WC | H de la Peña | 0 | 2 | |||||||||||||||||||
| J Gunnarsson | 6 | 3 | 6 | 6 | S Bruguera | 6 | 6 | ||||||||||||||||||||
 C Motta | 3 | 6 | 2 | J Gunnarsson | 5 | 2 | |||||||||||||||||||||
| R Azar | 1 | 3 | 6 | S Bruguera | 7 | 6 | |||||||||||||||||||||
| 6 | S Bruguera | 6 | 6 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | O Camporese | 6 | 6 | ||||||||||||||||||||||||
| B Orešar | 4 | 4 | 5 | O Camporese | 6 | 6 | |||||||||||||||||||||
 U Riglewski | 6 | 3 | M Vajda | 4 | 4 | ||||||||||||||||||||||
| M Vajda | 7 | 6 | 5 | O Camporese | 6 | 6 | |||||||||||||||||||||
| Q | R Argüello | 5 | 3 | 4 | M Rosset | 7 | 7 | ||||||||||||||||||||
| A Mronz | 7 | 6 | A Mronz | 4 | 2 | ||||||||||||||||||||||
| Q | P Albano | 4 | 2 | 4 | M Rosset | 6 | 6 | ||||||||||||||||||||
| 4 | M Rosset | 6 | 6 | 4 | M Rosset | 6 | 3 | 2 | |||||||||||||||||||
| 7 | G Prpić | 4 | 7 | 4 | 2 | H Skoff | 4 | 6 | 6 | ||||||||||||||||||
| R Furlan | 6 | 6 | 6 | R Furlan | 6 | 6 | |||||||||||||||||||||
| Q | JA Conde | 6 | 6 | Q | JA Conde | 2 | 4 | ||||||||||||||||||||
 M Kaplan | 4 | 1 | R Furlan | 6 | 6 | ||||||||||||||||||||||
| F Clavet | 3 | 1 | 2 | H Skoff | 7 | 7 | |||||||||||||||||||||
| P Canè | 6 | 6 | P Canè | 4 | 2 | ||||||||||||||||||||||
| C Bergström | 4 | 4 | 2 | H Skoff | 6 | 6 | |||||||||||||||||||||
| 2 | H Skoff | 6 | 6 | ||||||||||||||||||||||||
Marc Rosset defeated Jan Siemerink 6–2, 7–6(7–1) to win the 1993 Open 13 singles event.
Michael Stich defeated the defending champion Goran Ivanišević in the final, 4–6, 7–6(8–6), 7–6(7–3), 6–2 to win the singles tennis title at the 1993 Stockholm Open.
Andriy Medvedev defeated the defending champion Sergi Bruguera in the final, 7–5, 6–1, 6–3 to win the singles tennis title at the 1994 Monte Carlo Open.
Boris Becker defeated Goran Ivanišević in the final, 4–6, 6–4, 6–3, 7–6(7–4) to win the singles tennis title at the 1994 Stockholm Open.
Andre Agassi defeated Marc Rosset in the final, 6–3, 6–3, 4–6, 7–5 to win the singles tennis title at the 1994 Paris Open.
Thomas Muster defeated Sergi Bruguera in the final, 3–6, 7–6(7–5), 6–2, 6–3 to win the men's singles tennis title at the 1995 Italian Open.
Defending champion Thomas Muster defeated Richard Krajicek in the final, 6–2, 6–4, 3–6, 6–3 to win the men's singles tennis title at the 1996 Italian Open.
Andrei Chesnokov defeated Thomas Muster in the final, 7–5, 6–3, 6–3 to win the singles tennis title at the 1990 Monte Carlo Open.
Marc Rosset was the defending champion, but lost to Chuck Adams in the semifinal.
Alexander Volkov won in the final 6–2, 6–4 against Chuck Adams.
Ramesh Krishnan was the defending champion, but lost in the first round this year.
Marc Rosset was the defending champion, but lost in the first round this year.
Horst Skoff was the defending champion, but lost in the final this year.
Jim Courier defeated David Wheaton in the final, 4–6, 6–3, 6–4 to win the men's singles tennis title at the 1991 Miami Open.
Emilio Sánchez was the defending champion, but lost in the second round to Francisco Roig.
Alex O'Brien was the defending champion, but lost in the second round to Marc-Kevin Goellner.
Andrés Gómez was the defending champion, but lost in the second round to Marcelo Filippini.
Andrei Medvedev was the defending champion, but did not compete this year.
Emilio Sánchez was the defending champion, but lost in the semifinal to Horacio de la Peña.
Sergi Bruguera became the 3-time tournament winner by defeating Guy Forget 3–6, 7–5, 6–2, 6–1 in the final.
Horacio de la Peña was the defending champion, but lost in the third round to Francisco Clavet.