1999 du Maurier Open – Women's singles

Martina Hingis defeated the four-time defending champion Monica Seles in the final, 6–4, 6–4 to win the women's singles tennis title at the 1999 Canadian Open. Seles' match win-streak was an Open Era tournament record.

Seeds
The top eight seeds received a bye to the second round. • # Martina Hingis (champion)

• # 🇺🇸 Monica Seles (final)

• # 🇫🇷 Mary Pierce (semifinals)

• # 🇨🇿 Jana Novotná (second round)

• # 🇪🇸 Arantxa Sánchez Vicario (quarterfinals)

• # Amanda Coetzer (quarterfinals)

• # 🇫🇷 Nathalie Tauziat (second round)

• # n.a.

• # 🇦🇹 Barbara Schett (quarterfinals)

• # 🇫🇷 Sandrine Testud (quarterfinals)

• # n.a.

• # 🇪🇸 Conchita Martínez (third round)

• # Patty Schnyder (first round)

• # 🇷🇴 Irina Spîrlea (first round)

• # 🇷🇺 Elena Likhovtseva (third round)

• # 🇺🇸 Chanda Rubin (third round)

• # 🇺🇸 Amy Frazier (first round)