1990 Thriftway ATP Championships – Singles
| Singles | |
|---|---|
| 1990 Thriftway ATP Championships | |
| Champion | Stefan Edberg |
| Runner-up | Brad Gilbert |
| Score | 6–1, 6–1 |
| Draw | 56 |
| Seeds | 16 |
Stefan Edberg defeated the defending champion Brad Gilbert in the final, 6–1, 6–1 to win the singles' tennis title at the 1990 Cincinnati Masters.