1998 Sydney International – Women's singles

Martina Hingis was the defending champion but lost in the second round to Venus Williams.

Arantxa Sánchez-Vicario won in the final 6–1, 6–3 against Williams.

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


 * 1)  Martina Hingis (second round)
 * 2) 🇺🇸 Lindsay Davenport (quarterfinals)
 * 3)  Amanda Coetzer (second round)
 * 4)  Irina Spîrlea (second round)
 * 5) 🇪🇸 Arantxa Sánchez-Vicario (champion)
 * 6) 🇪🇸 Conchita Martínez (second round)
 * 7) 🇫🇷 Sandrine Testud (second round)
 * 8) 🇩🇪 Anke Huber (first round)