# 1998 Heineken Trophy – Women's singles

Ruxandra Dragomir was the defending champion but lost in the first round to Julie Halard-Decugis.
Halard-Decugis won in the final 6–3, 6–4 against Miriam Oremans.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top two seeds received a bye to the second round.
* Amanda Coetzer (second round)
* Sandrine Testud (semifinals)
* Dominique Van Roost (first round)
* Sabine Appelmans (quarterfinals)
* Ruxandra Dragomir (first round)
* Amélie Mauresmo (first round)
* Corina Morariu (second round)
* Gala León García (quarterfinals)

## 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

### Final

| Final | Final | Final | Final | Final |
| | Miriam Oremans | 3 | 4 | |
| | Julie Halard-Decugis | 6 | 6 | |

### Section 1

| 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 |
| | | | | 1 | A Coetzer | 4 | 2 | | | | | | | | | | |
| | A Glass | 5 | 6 | | K Po | 6 | 6 | | | | | | | | | | |
| | K Po | 7 | 7 | | | | | | | K Po | 6 | 6 | | | | | |
| Q | Y Yoshida | 6 | 7 | | | | | | | C Rubin | 2 | 3 | | | | | |
| | D Chládková | 4 | 5 | Q | Y Yoshida | 5 | 4 | | | | | | | | | | |
| | C Rubin | 6 | 6 | | C Rubin | 7 | 6 | | | | | | | | | | |
| 6 | A Mauresmo | 1 | 4 | | | | | | | | | | | K Po | 1 | 7 | 6 |
| 3 | D Van Roost | 3 | 6 | | | | | | | | | | | M Oremans | 6 | 6 | 7 |
| | M Oremans | 6 | 7 | | M Oremans | 7 | 6 | 6 | | | | | | | | | |
| | S-T Wang | 3 | 2 | Q | A Dechaume-Balleret | 6 | 7 | 2 | | | | | | | | | |
| Q | A Dechaume-Balleret | 6 | 6 | | | | | | | M Oremans | 6 | 2 | 6 | | | | |
| WC | K Boogert | 6 | 6 | | | | | | WC | K Boogert | 3 | 6 | 4 | | | | |
| | K Habšudová | 1 | 2 | WC | K Boogert | 4 | 6 | 7 | | | | | | | | | |
| WC | T Pisnik | 3 | 0 | 7 | C Morariu | 6 | 2 | 5 | | | | | | | | | |
| 7 | C Morariu | 6 | 6 | | | | | | | | | | | | | | |

### Section 2

| 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 |
| 5 | R Dragomir | 6 | 3 | | | | | | | | | | | | | | | |
| | J Halard-Decugis | 7 | 6 | | | J Halard-Decugis | 6 | 6 | | | | | | | | | | |
| | S Kleinová | 0 | 6 | 1 | | T Snyder | 2 | 0 | | | | | | | | | | |
| | T Snyder | 6 | 4 | 6 | | | | | | | J Halard-Decugis | 6 | 7 | 6 | | | | |
| | A Gerši | 6 | 6 | | | | | | | 4 | S Appelmans | 7 | 6 | 3 | | | | |
| | K Hrdličková | 1 | 4 | | | A Gerši | 3 | 2 | | | | | | | | | | |
| | C Torrens Valero | 2 | 1 | | 4 | S Appelmans | 6 | 6 | | | | | | | | | | |
| 4 | S Appelmans | 6 | 6 | | | | | | | | | | | | | J Halard-Decugis | 6 | 6 |
| 8 | G León García | 6 | 6 | | | | | | | | | | | | 2 | S Testud | 3 | 3 |
| | F Labat | 4 | 1 | | 8 | G León García | 4 | 7 | 7 | | | | | | | | | |
| Q | P Wartusch | 7 | 1 | 6 | Q | P Wartusch | 6 | 6 | 6 | | | | | | | | | |
| | C Cristea | 6 | 6 | 4 | | | | | | 8 | G León García | 6 | 4 | | | | | |
| | M Sánchez Lorenzo | 2 | 3 | | | | | | | 2 | S Testud | 7 | 6 | | | | | |
| Q | L Golarsa | 6 | 6 | | Q | L Golarsa | 3 | 4 | | | | | | | | | | |
| | | | | | 2 | S Testud | 6 | 6 | | | | | | | | | | |