1990 Canadian Open – Women's singles
| Women's singles | |
|---|---|
| 1990 Canadian Open | |
| Champion | Steffi Graf |
| Runner-up | Katerina Maleeva |
| Score | 6–1, 6–7, 6–3 |
| Draw | 56 (8Q) |
| Seeds | 16 |
Steffi Graf defeated Katerina Maleeva in the final, 6–1, 6–7, 6–3 to win the women's singles tennis title at the 1990 Canadian Open.
Martina Navratilova was the reigning champion, but chose not to participate.