# 1990 DHL Singapore Open – Singles

Belinda Cordwell was the defending champion, but lost in the second round to Patricia Hy.
Naoko Sawamatsu won the title by defeating Sarah Loosemore 7–6$^{(7–5)}$, 3–6, 6–4 in the final.

## Seeds

The first eight seeds received a bye to the second round.
* Anne Minter (third round)
* Betsy Nagelsen (third round)
* Belinda Cordwell (second round)
* Etsuko Inoue (second round)
* Akiko Kijimuta (second round)
* Jo-Anne Faull (second round)
* Sandra Wasserman (third round)
* Sabine Appelmans (semifinals)
* Marianne Werdel (quarterfinals)
* Hu Na (third round)
* Monique Javer (third round)
* Maya Kidowaki (semifinals)
* Louise Field (third round)
* Eva Krapl (second round)
* Pascale Paradis (second round)
* Martina Pawlik (second 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

| Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| | Pilar Vásquez | 2 | 3 | | | | | | | | | | |
| 12 | Maya Kidowaki | 6 | 6 | | | | | | | | | | |
| 12 | Maya Kidowaki | 6 | 6 | | 12 | Maya Kidowaki | 6 | 6 | 3 | | | | |
| | | | | | | Naoko Sawamatsu | 4 | 7 | 6 | | | | |
| | Tamaka Takagi | 1 | 3 | | | Naoko Sawamatsu | 4 | 7 | 6 | | | | |
| | Naoko Sawamatsu | 6 | 6 | | | | | | | | | | |
| | Naoko Sawamatsu | 6 | 6 | | | | | | | Naoko Sawamatsu | 7$^7$ | 3 | 6 |
| | | | | | | | | | | Sarah Loosemore | 6$^5$ | 6 | 4 |
| | Sarah Loosemore | 6 | 6 | | | | | | | | | | | Sarah Loosemore | 6$^5$ | 6 | 4 |
| | Patricia Hy | 3 | 4 | | | | | | | | | | |
| | Patricia Hy | 3 | 4 | | | Sarah Loosemore | 5 | 6 | 6 | | | | |
| | | | | | 8 | Sabine Appelmans | 7 | 2 | 3 | | | | |
| 8 | Sabine Appelmans | 7 | 3 | 6 | 8 | Sabine Appelmans | 7 | 2 | 3 | | | | |
| 9 | Marianne Werdel | 5 | 6 | 3 | | | | | | | | | |

### Top half
#### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 1 | A Minter | 6 | 6 | | | | | | | | |
| | H Ludloff | 7 | 1 | 6 | | H Ludloff | 3 | 2 | | | | | | | | |
| | C Wood | 5 | 6 | 4 | | | | | 1 | A Minter | 4 | 4 | | | | |
| | P Vásquez | 6 | 6 | | | | | | | P Vásquez | 6 | 6 | | | | |
| Q | L Antonoplis | 4 | 3 | | | P Vásquez | 6 | 6 | | | | | | | | |
| Q | KA Guse | 0 | 1 | | 14 | E Krapl | 3 | 3 | | | | | | | | |
| 14 | E Krapl | 6 | 6 | | | | | | | | | | | P Vásquez | 2 | 3 |
| 12 | M Kidowaki | 6 | 7 | | | | | | | | | | 12 | M Kidowaki | 6 | 6 |
| | C Suire | 4 | 5 | | 12 | M Kidowaki | 6 | 6 | | | | | | | | |
| | B Borneo | 4 | 6 | 3 | | Y Koizumi | 2 | 2 | | | | | | | | |
| | Y Koizumi | 6 | 4 | 6 | | | | | 12 | M Kidowaki | 6 | 6 | | | | |
| | M Jaggard | 6 | 3 | 6 | | | | | | M Jaggard | 3 | 2 | | | | |
| | B Reinstadler | 3 | 6 | 3 | | M Jaggard | 6 | 6 | | | | | | | | |
| | | | | | 5 | A Kijimuta | 2 | 1 | | | | | | | | |

#### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 4 | E Inoue | 3 | 6 | 1 | | | | | | | | |
| Q | A May | 2 | 1 | | | T Takagi | 6 | 1 | 6 | | | | | | | | |
| | T Takagi | 6 | 6 | | | | | | | | T Takagi | 2 | 6 | 6 | | | |
| | J Durie | 6 | 6 | 6 | | | | | | 10 | N Hu | 6 | 3 | 3 | | | |
| | P Thorén | 2 | 7 | 2 | | J Durie | 2 | 3 | | | | | | | | | |
| | E Okagawa | 3 | 1 | | 10 | N Hu | 6 | 6 | | | | | | | | | |
| 10 | N Hu | 6 | 6 | | | | | | | | | | | | T Takagi | 1 | 3 |
| 15 | P Paradis | 6 | 5 | 6 | | | | | | | | | | | N Sawamatsu | 6 | 6 |
| | S Frankl | 1 | 7 | 3 | 15 | P Paradis | 6 | 4 | 3 | | | | | | | | |
| Q | S Bartlett | 0 | 2 | | | N Sawamatsu | 3 | 6 | 6 | | | | | | | | |
| | N Sawamatsu | 6 | 6 | | | | | | | | N Sawamatsu | 6 | 6 | 6 | | | |
| | S Amiach | 1 | 6 | 7 | | | | | | 7 | S Wasserman | 2 | 7 | 4 | | | |
| | T Morton | 6 | 4 | 6 | | S Amiach | 3 | 2 | | | | | | | | | |
| | | | | | 7 | S Wasserman | 6 | 6 | | | | | | | | | |

### Bottom half
#### Section 3

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 6 | JA Faull | 4 | 4 | | | | | | | | |
| | A Ivan | 1 | 5 | | | C Toleafoa | 6 | 6 | | | | | | | | |
| | C Toleafoa | 6 | 7 | | | | | | | C Toleafoa | 7 | 4 | 2 | | | |
| | J Strnadová | 3 | 4 | | | | | | | S Loosemore | 5 | 6 | 6 | | | |
| | S Loosemore | 6 | 6 | | | S Loosemore | 6 | 6 | | | | | | | | |
| | J Richardson | 4 | 6 | 6 | 16 | M Pawlik | 0 | 1 | | | | | | | | |
| 16 | M Pawlik | 6 | 4 | 7 | | | | | | | | | | S Loosemore | 6 | 6 |
| 13 | L Field | 6 | 6 | | | | | | | | | | | P Hy | 3 | 4 |
| | J Hetherington | 4 | 2 | | 13 | L Field | 6 | 6 | | | | | | | | |
| Q | L Bartlett | 6 | 6 | 7 | Q | L Bartlett | 4 | 2 | | | | | | | | |
| Q | M Miyauchi | 3 | 7 | 5 | | | | | 13 | L Field | 6 | 3 | 5 | | | |
| | P Hy | 6 | 6 | | | | | | | P Hy | 3 | 6 | 7 | | | |
| | A Villagrán | 1 | 2 | | | P Hy | 6 | 7 | | | | | | | | |
| | | | | | 3 | B Cordwell | 2 | 6 | | | | | | | | |

#### Section 4

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Third round | Third round | Third round | Third round | Third round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals |
| | | | | | 8 | S Appelmans | 6 | 6 | | | | | | | | | | | |
| | A Simpkin | 4 | 6 | 2 | Q | D Jones | 4 | 1 | | | | | | | | | | | |
| Q | D Jones | 6 | 4 | 6 | | | | | | 8 | S Appelmans | 6 | 3 | 7 | | | | | |
| | M Lindström | 6 | 2 | 1 | | | | | | 11 | M Javer | 3 | 6 | 5 | | | | | |
| | M Bowrey | 4 | 6 | 6 | | M Bowrey | 4 | 3 | | | | | | | | | | | |
| | K Godridge | 4 | 0 | | 11 | M Javer | 6 | 6 | | | | | | | | | | | |
| 11 | M Javer | 6 | 6 | | | | | | | | | | | | 8 | S Appelmans | 7 | 3 | 6 |
| 9 | M Werdel | 6 | 6 | | | | | | | | | | | | 9 | M Werdel | 5 | 6 | 3 |
| | R Stubbs | 3 | 3 | | 9 | M Werdel | 5 | 6 | 6 | | | | | | | | | | |
| | M Maleeva | 6 | 6 | | | M Maleeva | 7 | 0 | 0 | | | | | | | | | | |
| Q | P Moreno | 0 | 4 | | | | | | | 9 | M Werdel | 6 | 6 | | | | | | |
| | T Zambrzycki | 0 | 4 | | | | | | | 2 | B Nagelsen | 2 | 3 | | | | | | |
| | L Allen | 6 | 6 | | | L Allen | 4 | 3 | | | | | | | | | | | |
| | | | | | 2 | B Nagelsen | 6 | 6 | | | | | | | | | | | |