Matteo Berrettini defeated Gregoire Barrere 6–4, 6–3 in the first round of the Canada Masters, an ATP Masters 1000 event on hard court in Montreal on 8 August 2023. Berrettini, the pre-match favourite at 1.37 odds, delivered a straightforward performance to advance as expected, controlling both sets against the French player. The Italian's superior ranking and seeding proved decisive as he progressed through the opening round without significant resistance. Berrettini's victory maintained his momentum heading deeper into the tournament.