1990 DHL Singapore Open – Singles

Belinda Cordwell was the defending champion, but lost in the second round to Patricia Hy.

Naoko Sawamatsu won the title by defeating Sarah Loosemore 7–6(7–5), 3–6, 6–4 in the final.

Seeds
The first eight seeds received a bye to the second round. • # 🇦🇺 Anne Minter (third round)

• # 🇺🇸 Betsy Nagelsen (third round)

• # 🇳🇿 Belinda Cordwell (second round)

• # 🇯🇵 Etsuko Inoue (second round)

• # 🇯🇵 Akiko Kijimuta (second round)

• # 🇦🇺 Jo-Anne Faull (second round)

• # 🇧🇪 Sandra Wasserman (third round)

• # 🇧🇪 Sabine Appelmans (semifinals)

• # 🇺🇸 Marianne Werdel (quarterfinals)

• # 🇺🇸 Hu Na (third round)

• # 🇬🇧 Monique Javer (third round)

• # 🇯🇵 Maya Kidowaki (semifinals)

• # 🇦🇺 Louise Field (third round)

• # Eva Krapl (second round)

• # 🇫🇷 Pascale Paradis (second round)

• # Martina Pawlik (second round)