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.

[1] Pablo Carreño Busta was the reigning champion,[2] but withdrew before the tournament began due to injury.

[3] The top eight seeds received a bye into the second round.

Click on the seed number of a player to go to their draw section.

Seedings are based on ATP rankings as of 31 July 2023.