| Singles | |
|---|---|
| 1991 Dutch Open | |
| Champion |  Magnus Gustafsson |
| Runner-up |  Jordi Arrese |
| Final score | 5–7, 7–6(7–2), 2–6, 6–1, 6–0 |
Francisco Clavet was the defending champion of the singles event at the Dutch Open men's tennis tournament, but he lost to Magnus Gustafsson.
Gustafsson won in the final 5–7, 7–6(7–2), 2–6, 6–1, 6–0 against Jordi Arrese.
Champion seeds are indicated in bold while text in italics indicates the round in which that seed was eliminated.
Sergi Bruguera (second round)
Karel Nováček (semifinals)
Andrei Cherkasov (first round) Magnus Gustafsson (champion)
Goran Prpić (second round)
Horst Skoff (second round)
Guillermo Pérez Roldán (first round)
Omar Camporese (second round)| Semifinals | Final | ||||||||||||||
 Mark Koevermans | 3 | 6 | 4 | ||||||||||||
| Jordi Arrese | 6 | 3 | 6 | ||||||||||||
| Jordi Arrese | 7 | 62 | 6 | 1 | 0 | ||||||||||
| 4 | Magnus Gustafsson | 5 | 77 | 2 | 6 | 6 | |||||||||
| 4 | Magnus Gustafsson | 7 | 6 | ||||||||||||
| 2 | Karel Nováček | 6 | 3 | ||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | S Bruguera | 6 | 6 | ||||||||||||||||||||||||
| Q |  D Pérez | 4 | 4 | 1 | S Bruguera | 5 | 4 | ||||||||||||||||||||
| M Koevermans | 7 | 6 | M Koevermans | 7 | 6 | ||||||||||||||||||||||
| P Haarhuis | 4 | 2 | M Koevermans | 6 | 6 | ||||||||||||||||||||||
| Q | R Furlan | 3 | 6 | 6 | R Furlan | 1 | 1 | ||||||||||||||||||||
| M Filippini | 6 | 2 | 1 | Q | R Furlan | 1 | 7 | 6 | |||||||||||||||||||
| 8 | O Camporese | 6 | 6 | 8 | O Camporese | 6 | 6 | 2 | |||||||||||||||||||
| M Jaite | 1 | 3 | M Koevermans | 3 | 6 | 4 | |||||||||||||||||||||
| 6 | H Skoff | 6 | 6 | J Arrese | 6 | 3 | 6 | ||||||||||||||||||||
| WC | J Eltingh | 4 | 3 | 6 | H Skoff | 6 | 6 | 2 | |||||||||||||||||||
| J Arrese | 6 | 6 | J Arrese | 3 | 7 | 6 | |||||||||||||||||||||
| Q |  O Delaître | 0 | 2 | J Arrese | 6 | 6 | |||||||||||||||||||||
| T Carbonell | 6 | 6 | WC | T Muster | 4 | 1 | |||||||||||||||||||||
 R Agénor | 1 | 3 | T Carbonell | 7 | 1 | 1 | |||||||||||||||||||||
| WC | T Muster | 6 | 6 | WC | T Muster | 6 | 6 | 6 | |||||||||||||||||||
| 3 | A Cherkasov | 3 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 4 | M Gustafsson | 7 | 7 | ||||||||||||||||||||||||
| Q | F Clavet | 6 | 6 | 4 | M Gustafsson | 7 | 7 | ||||||||||||||||||||
| L Jonsson | 3 | 6 | 6 | L Jonsson | 5 | 5 | |||||||||||||||||||||
| H de la Peña | 6 | 4 | 0 | 4 | M Gustafsson | 6 | 6 | 6 | |||||||||||||||||||
 M Rosset | 6 | 6 | M Rosset | 7 | 2 | 4 | |||||||||||||||||||||
| R Krajicek | 4 | 4 | M Rosset | 7 | 3 | 6 | |||||||||||||||||||||
| 5 | G Prpić | 6 | 7 | 5 | G Prpić | 6 | 6 | 4 | |||||||||||||||||||
| Q |  K Braasch | 3 | 6 | 4 | M Gustafsson | 7 | 6 | ||||||||||||||||||||
| 7 | G Pérez Roldán | 4 | 6 | 6 | 2 | K Nováček | 6 | 3 | |||||||||||||||||||
| WC | T Champion | 6 | 3 | 7 | WC | T Champion | 6 | 4 | 4 | ||||||||||||||||||
| F Davín | 6 | 6 | F Davín | 3 | 6 | 6 | |||||||||||||||||||||
| J Siemerink | 4 | 3 | F Davín | 6 | 6 | 2 | |||||||||||||||||||||
| C Pioline | 6 | 6 | 2 | K Nováček | 7 | 2 | 6 | ||||||||||||||||||||
| Q | F Roig | 4 | 2 | C Pioline | 4 | 4 | |||||||||||||||||||||
| A Mancini | 7 | 3 | 1 | 2 | K Nováček | 6 | 6 | ||||||||||||||||||||
| 2 | K Nováček | 5 | 6 | 6 | |||||||||||||||||||||||
Unseeded Thomas Enqvist defeated Chuck Adams 6–2, 6–1 to win the 1995 Benson and Hedges Open singles competition. Magnus Gustafsson was the champion but did not defend his title.
Thomas Enqvist was the defending champion but did not compete that year.
Fernando González was the defending champion but lost in the first round to Michal Tabara.
Wayne Ferreira defeated Todd Woodbridge in the final, 6–2, 6–4 to win the men's singles tennis title at the 1996 Canadian Open.
Juan Aguilera defeated Boris Becker in the final, 6–1, 6–0, 7–6 to win the singles tennis title at the 1990 Hamburg European Open.
Magnus Gustafsson was the defending champion, but the sixth seeded Swede lost in the second round to Jacco Eltingh. Karel Nováček won the singles event at the 1992 Dutch Open defeating Jordi Arrese in the final 6–2, 6–3, 2–6, 7–5 and captured his second title in Hilversum.
Karel Nováček was the defending champion, but the second seeded Czech lost in the first round to Andrei Cherkasov. Carlos Costa won in the final 6–1, 6–2, 6–3 against Magnus Gustafsson and captured his third individual title at the ATP Tour.
Sláva Doseděl was the defending champion, but the eight seeded Czech lost in the quarterfinals to qualifier Mariano Zabaleta. Magnus Norman won in the final 6–3, 6–3, 2–6, 6–4 against number six seed Richard Fromberg and captured the second title of his professional career.
Magnus Larsson was the defending champion but did not compete that year.
Andrew Ilie was the defending champion but lost in the quarterfinals to Xavier Malisse. Andy Roddick won in the final 6–2, 6–4 against Malisse, earning the first title of his career.
Andrei Pavel was the defending champion but lost in the quarterfinals to Magnus Gustafsson.
Magnus Norman was the defending champion but lost in the semifinals to Bohdan Ulihrach.
Fernando Meligeni was the defending champion but lost in the first round to Marcelo Filippini.
Kelly Evernden was the defending champion but lost in the first round to Lars-Anders Wahlgren.
Magnus Gustafsson was the defending champion, but did not participate.
The 1998 Swedish Open was a men's tennis tournament played on Clay in Båstad, Sweden that was part of the International Series of the 1998 ATP Tour. It was the fifty-first edition of the tournament and was held from 6–12 July 1998.
Félix Mantilla defeated Karim Alami in the final, 7–6(7–2), 6–3, 6–3 to win the singles tennis title at the 1999 Barcelona Open.
Alberto Martín was the defending champion but lost in the quarterfinals to Markus Hantschk.
The defending champion was Magnus Gustafsson, but he lost in the second round to Martín Rodríguez. The unseeded Juan Antonio Marín from Costa Rica won the singles title.
Magnus Gustafsson and Magnus Larsson were the defending champions, but they did not participate this year.