| Champ: | Ivan Lendl |
| Runner: |  Tim Mayotte |
| Score: | 6–3, 6–0 |
| Draw: | 56 |
| Seeds: | 16 |
| Type: | singles doubles |
| After Year: | no |
See main article: 1990 SkyDome World Tennis Tournament. Joakim Nyström was the champion of the event when it last took place, in 1986. He did not participate in 1990.
Ivan Lendl won the title, defeating Tim Mayotte 6–3, 6–0, in the final.
The top eight seeds receive a bye into the second round.