# 1990 Philips Open – Singles

Andrei Chesnokov was the defending champion, but lost in the second round to Fabrice Santoro.
Juan Aguilera won the title by defeating Guy Forget 2–6, 6–3, 6–4 in the final.

## Seeds

* Jay Berger (quarterfinals)
* Alberto Mancini (first round)
* Horst Skoff (first round)
* Andrei Chesnokov (second round)
* Yannick Noah (first round)
* Guillermo Pérez Roldán (second round, retired)
* Petr Korda (first round)
* Jordi Arrese (first round)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| | Andrei Cherkasov | 6 | 6 | 4 | | | | | |
| WC | Guy Forget | 4 | 7 | 6 | | | | | |
| WC | Guy Forget | 4 | 7 | 6 | WC | Guy Forget | 6 | 3 | 4 |
| | | | | | | Juan Aguilera | 2 | 6 | 6 |
| | Marc Rosset | 3 | 0 | | | Juan Aguilera | 2 | 6 | 6 |
| | Juan Aguilera | 6 | 6 | | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | J Berger | 7 | 6 | | | | | | | | | | | | | | | | |
| Q | O Soules | 6 | 3 | | 1/WC | J Berger | 6 | 1 | 7 | | | | | | | | | | |
| | M Filippini | 6 | 3 | | Q | H Leconte | 3 | 6 | 6 | | | | | | | | | | |
| Q | H Leconte | 7 | 6 | | | | | | | 1/WC | J Berger | 6 | 2 | 3 | | | | | |
| | M Stich | 6 | 3 | 6 | | | | | | | A Cherkasov | 2 | 6 | 6 | | | | | |
| | J Arias | 3 | 6 | 3 | | M Stich | 4 | 4 | | | | | | | | | | | |
| | A Cherkasov | 0 | 7 | 7 | | A Cherkasov | 6 | 6 | | | | | | | | | | | |
| 7 | P Korda | 6 | 5 | 5 | | | | | | | | | | | | A Cherkasov | 6 | 6 | 4 |
| 3 | H Skoff | 6 | 4 | 1 | | | | | | | | | | | WC | G Forget | 4 | 7 | 6 |
| | N Kroon | 2 | 6 | 6 | | N Kroon | 6 | 1 | | | | | | | | | | | |
| | V Paloheimo | 2 | 5 | | WC | G Forget | 7 | 6 | | | | | | | | | | | |
| WC | G Forget | 6 | 7 | | | | | | | WC | G Forget | 7 | 6 | | | | | | |
| | J Gunnarsson | 6 | 5 | | | | | | | | G Prpić | 6 | 2 | | | | | | |
| | G Prpić | 7 | 7 | | | G Prpić | 7 | 6 | 2 | | | | | | | | | | |
| | R Agénor | 6 | 3 | 4 | 6 | G Pérez Roldán | 5 | 7 | 0$^r$ | | | | | | | | | | |
| 6 | G Pérez Roldán | 1 | 6 | 6 | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals |
| 5 | Y Noah | 7 | 3 | 3 | | | | | | | | | | | | | |
| | M Rosset | 5 | 6 | 6 | | M Rosset | 7 | 4 | 6 | | | | | | | | |
| | T Carbonell | 6 | 6 | | | T Carbonell | 6 | 6 | 4 | | | | | | | | |
| | M Střelba | 3 | 1 | | | | | | | | M Rosset | 6 | 5 | 6 | | | |
| | JP Fleurian | 6 | 2 | | | | | | | WC | F Santoro | 0 | 7 | 2 | | | |
| WC | F Santoro | 7 | 6 | | WC | F Santoro | 6 | 6 | | | | | | | | | |
| | K Nováček | 6 | 1 | | 4 | A Chesnokov | 3 | 4 | | | | | | | | | |
| 4 | A Chesnokov | 7 | 6 | | | | | | | | | | | | M Rosset | 3 | 0 |
| 8 | J Arrese | 6 | 3 | 4 | | | | | | | | | | | J Aguilera | 6 | 6 |
| | A Rahunen | 3 | 6 | 6 | | A Rahunen | 2 | 6 | 4 | | | | | | | | |
| | J Sánchez | 4 | 6 | 1 | | J Aguilera | 6 | 2 | 6 | | | | | | | | |
| | J Aguilera | 6 | 2 | 6 | | | | | | | J Aguilera | 6 | 6 | | | | |
| | J Hlasek | 3 | 6 | 6 | | | | | | | J Hlasek | 4 | 4 | | | | |
| Q | T Tulasne | 6 | 4 | 4 | | J Hlasek | 6 | 6 | | | | | | | | | |
| Q | C Pistolesi | 6 | 6 | | Q | C Pistolesi | 4 | 4 | | | | | | | | | |
| 2 | A Mancini | 4 | 3 | | | | | | | | | | | | | | |