1998 du Maurier Open – Women's singles
# 1998 du Maurier Open – Women's singles

Three-time defending champion Monica Seles defeated Arantxa Sánchez Vicario in the final, 6–3, 6–2 to win the women's singles tennis title at the 1998 Canadian Open.

## Seeds

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top nine seeds received a bye to the second round.

* Martina Hingis (semifinals)
* Jana Novotná (semifinals)
* Arantxa Sánchez Vicario (final)
* n/a
* Monica Seles (champion)
* Conchita Martínez (quarterfinals)
* Steffi Graf (third round)
* Amanda Coetzer (third round)
* Irina Spîrlea (third round)
* Patty Schnyder (first round)
* Nathalie Tauziat (third round)
* Dominique Van Roost (second round)
* Mary Pierce (first round)
* Sandrine Testud (quarterfinals)
* Anna Kournikova (third round)
* Ai Sugiyama (third round)
* Lisa Raymond (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 |
| - | - | - | - | - | - | - | - | - |
| 1 | Martina Hingis | 6 | 3 | 2 | | | | |
| 5 | Monica Seles | 4 | 6 | 6 | | | | |
| 5 | Monica Seles | 4 | 6 | 6 | 5 | Monica Seles | 6 | 6 |
| | | | | | 3 | Arantxa Sánchez Vicario | 3 | 2 |
| 3 | Arantxa Sánchez Vicario | 4 | 7 | 6 | 3 | Arantxa Sánchez Vicario | 3 | 2 |
| 2 | Jana Novotná | 6 | 6 | 2 | | | | |

### Top half

**Section 1**

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | 1 | M Hingis | 6 | 6 | | | | | | | | | | | |
| | S Plischke | 6 | 6 | | S Plischke | 4 | 1 | | | | | | | | | | | |
| | R Grande | 1 | 1 | | | | | | 1 | M Hingis | 6 | 6 | | | | | | |
| | M Vento | 6 | 6 | | | | | | 16 | A Sugiyama | 3 | 0 | | | | | | |
| | A Mauresmo | 3 | 4 | | M Vento | 4 | 0 | | | | | | | | | | | |
| Q | N Dechy | 6 | 5 | 16 | A Sugiyama | 6 | 6 | | | | | | | | | | | |
| 16 | A Sugiyama | 7 | 7 | | | | | | | | | | | 1 | M Hingis | 7 | 3 | 6 |
| 14 | S Testud | 6 | 6 | | | | | | | | | | | 14 | S Testud | 6 | 6 | 4 |
| Q | R McQuillan | 1 | 3 | 14 | S Testud | 6 | 6 | 6 | | | | | | | | | | |
| | I Majoli | 6 | 6 | | I Majoli | 7 | 4 | 1 | | | | | | | | | | |
| | B Paulus | 3 | 1 | | | | | | 14 | S Testud | 7 | 4 | 6 | | | | | |
| WC | S Jeyaseelan | 7 | 6 | | | | | | 9 | I Spîrlea | 6 | 6 | 1 | | | | | |
| Q | N Pratt | 5 | 3 | WC | S Jeyaseelan | 7 | 6 | 0 | | | | | | | | | | |
| | | | | 9 | I Spîrlea | 6 | 7 | 6 | | | | | | | | | | |

**Section 2**

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | 5 | M Seles | 6 | 6 | | | | | | | | |
| | T Snyder | 7 | 6 | | T Snyder | 2 | 1 | | | | | | | | |
| | A Miller | 5 | 2 | | | | | 5 | M Seles | 6 | 6 | | | | |
| | Y Basuki | 6 | 6 | | | | | | Y Basuki | 3 | 3 | | | | |
| Q | S-T Wang | 3 | 1 | | Y Basuki | 7 | 6 | | | | | | | | |
| WC | J Nejedly | 4 | 2 | 12 | D Van Roost | 5 | 3 | | | | | | | | |
| 12 | D Van Roost | 6 | 6 | | | | | | | | | 5 | M Seles | 6 | 6 |
| 10 | P Schnyder | 4 | 3 | | | | | | | | | | A Huber | 3 | 4 |
| Q | F Labat | 6 | 6 | Q | F Labat | 2 | 4 | | | | | | | | |
| | A Huber | 6 | 6 | | A Huber | 6 | 6 | | | | | | | | |
| WC | V Webb | 4 | 1 | | | | | | A Huber | 7 | 7 | | | | |
| | F Li | 6 | 7 | | | | | 8 | A Coetzer | 5 | 6 | | | | |
| Q | A Dechaume-Balleret | 3 | 5 | | F Li | 3 | 4 | | | | | | | | |
| | | | | 8 | A Coetzer | 6 | 6 | | | | | | | | |

### Bottom half

**Section 3**

| 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 6 | C Martínez | 7 | 6 | | | | | | | | | | |
| | J Halard-Decugis | 0 | 7 | 6 | Q | A Frazier | 6 | 4 | | | | | | | | | | |
| Q | A Frazier | 6 | 5 | 7 | | | | | | 6 | C Martínez | 6 | 6 | | | | | |
| | R Dragomir | 6 | 7 | | | | | | | 15 | A Kournikova | 0 | 3 | | | | | |
| | A-G Sidot | 3 | 6 | | | R Dragomir | 6 | 2 | 4 | | | | | | | | | |
| | A Fusai | 2 | 4 | | 15 | A Kournikova | 4 | 6 | 6 | | | | | | | | | |
| 15 | A Kournikova | 6 | 6 | | | | | | | | | | | | 6 | C Martínez | 3 | 4 |
| 11 | N Tauziat | 4 | 6 | 6 | | | | | | | | | | | 3 | A Sánchez Vicario | 6 | 6 |
| Q | S Cacic | 6 | 4 | 2 | 11 | N Tauziat | 6 | 6 | | | | | | | | | | |
| | T Tanasugarn | 1 | 6 | | | K Po | 3 | 3 | | | | | | | | | | |
| | K Po | 6 | 7 | | | | | | | 11 | N Tauziat | 6 | 1 | 2 | | | | |
| | N Sawamatsu | 4 | 3 | | | | | | | 3 | A Sánchez Vicario | 3 | 6 | 6 | | | | |
| | K Habšudová | 6 | 6 | | | K Habšudová | 6 | 5 | 2 | | | | | | | | | |
| | | | | | 3 | A Sánchez Vicario | 0 | 7 | 6 | | | | | | | | | |

**Section 4**

| 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 | Quarterfinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| | | | | | 7 | S Graf | 6 | 6 | | | | | | | | | |
| | V Ruano Pascual | 5 | 6 | 6 | | V Ruano Pascual | 0 | 1 | | | | | | | | | |
| LL | K Hrdličková | 7 | 4 | 2 | | | | | 7 | S Graf | 4 | 4 | | | | | |
| LL | A Smashnova | 6 | 5 | 2 | | | | | | M Serna | 6 | 6 | | | | | |
| | M Serna | 1 | 7 | 6 | | M Serna | 7 | 6 | | | | | | | | | |
| | C Morariu | 7 | 1 | 6 | | C Morariu | 6 | 3 | | | | | | | | | |
| 17 | L Raymond | 6 | 6 | 2 | | | | | | | | | | M Serna | 6 | 1 | 1 |
| 13 | M Pierce | 1 | 1 | | | | | | | | | | 2 | J Novotná | 2 | 6 | 6 |
| | M J Fernández | 6 | 6 | | | M J Fernández | 5 | 3 | | | | | | | | | |
| | S Farina | 7 | 6 | 6 | | S Farina | 7 | 6 | | | | | | | | | |
| | B Schett | 5 | 7 | 1 | | | | | | S Farina | 1 | 4 | | | | | |
| | M Oremans | 4 | 3 | | | | | | 2 | J Novotná | 6 | 6 | | | | | |
| | E Likhovtseva | 6 | 6 | | | E Likhovtseva | 5 | 2 | | | | | | | | | |
| | | | | | 2 | J Novotná | 7 | 6 | | | | | | | | | |
