Overview
- Mariano Navone beat former top-10 Matteo Berrettini in three sets to reach the second round in Montreal, reversing previous losses to the Italian.
- Sebastián Báez defeated Mattia Bellucci and Thiago Tirante edged qualifier Duncan Chan in a final-set tiebreak to join Juan Manuel Cerúndolo, who beat Hamad Medjedovic, among the winners.
- Román Burruchaga surrendered a 6-4, 4-2 lead and was eliminated by Alexei Popyrin, and Solana Sierra lost to Sloane Stephens in the women's draw.
- Advancing Argentines now face much tougher opponents in round two, with Navone drawn against 14th seed Valentin Vacherot, Cerúndolo versus Casper Ruud, Tirante set to play Taylor Fritz, and Báez meeting Zizou Bergs.
- Victories at a Masters 1000 event carry significant ranking points and momentum for players recovering form or returning from injury, and Tirante highlighted serve progress and mental resilience after his win.