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.


 * 1)  Martina Hingis (semifinals)
 * 2) 🇨🇿 Jana Novotná (semifinals)
 * 3) 🇪🇸 Arantxa Sánchez Vicario (final)
 * 4) 🇺🇸 Venus Williams (withdrew)
 * 5) 🇺🇸 Monica Seles (champion)
 * 6) 🇪🇸 Conchita Martínez (quarterfinals)
 * 7) 🇩🇪 Steffi Graf (third round)
 * 8)  Amanda Coetzer (third round)
 * 9)  Irina Spîrlea (third round)
 * 10)  Patty Schnyder (first round)
 * 11) 🇫🇷 Nathalie Tauziat (third round)
 * 12) 🇧🇪 Dominique Van Roost (second round)
 * 13) 🇫🇷 Mary Pierce (first round)
 * 14) 🇫🇷 Sandrine Testud (quarterfinals)
 * 15) 🇷🇺 Anna Kournikova (third round)
 * 16) 🇯🇵 Ai Sugiyama (third round)
 * 17) 🇺🇸 Lisa Raymond (first round)

Qualifying seeds
• # 🇮🇱 Anna Smashnova (qualifying competition, lucky loser)

• # 🇦🇷 Florencia Labat (qualified)

• # (n/a)

• # 🇧🇾 Olga Barabanschikova (first round)

• # (n/a)

• # 🇫🇷 Nathalie Dechy (qualified)

• # Wang Shi-ting (qualified)

• # 🇯🇵 Miho Saeki (qualifying competition, retired)

• # 🇦🇺 Rachel McQuillan (qualified)

• # 🇺🇸 Sandra Cacic (qualified)

Qualifiers
• # 🇺🇸 Amy Frazier

• # Wang Shi-ting

• # 🇦🇺 Rachel McQuillan

• # 🇺🇸 Sandra Cacic

• # 🇦🇺 Nicole Pratt

• # 🇫🇷 Alexia Dechaume-Balleret

• # 🇫🇷 Nathalie Dechy

• # 🇦🇷 Florencia Labat

Lucky losers
• # 🇮🇱 Anna Smashnova

• # 🇨🇿 Květa Hrdličková