2023 National Bank Open – Men's singles
| Men's singles | |
|---|---|
| 2023 National Bank Open | |
| Champion | Jannik Sinner |
| Runner-up | Alex de Minaur |
| Score | 6–4, 6–1 |
| Draw | 56 |
| Seeds | 16 |
Jannik Sinner defeated Alex de Minaur in the final, 6–4, 6–1 to win the men's singles title at the 2023 Canadian Open. It was his first ATP Tour Masters 1000 title and eighth ATP Tour singles title overall.
Pablo Carreño Busta was the reigning champion, but withdrew before the tournament began due to injury.