ATP - Toronto 1R start

First round commenced in Toronto.

2025 National Bank Open presented by Rogers, an ATP Masters 1000 tournament, on Hard Outdoor, Toronto, Canada, 27 July - 7 August 2025.

Defending champion:

Alexei Popyrin who defeated Andrey Rublev (5) 6-2 6-4

17th seed Ugo Humbert withdrew after the main draw was published, and was replaced by lucky loser Térence Atmane.

Atmane received the first round bye originally given to Humbert.

Laslo Djere withdrew after the main draw was published, and was replaced by lucky loser Tseng Chun-hsin.

Luciano Arderi withdrew after the main draw was published, and was replaced by lucky loser Dalibor Svrčina.

First round results:

- Adam Walton defeated Benjamin Bonzi 4-6 6-0 6-3

- Tomás Martín Etcheverry defeated qualifier Pierre-Hugues Herbert 6-4 4-6 7-5

- Wildcard Nicolas Arseneault defeated qualifier Valentin Royer 6-3 7-6(4)

- Miomir Kecmanović defeated Quentin Halys 4-6 6-4 7-5

- Giovanni Mpetshi Perricard defeated qualifier Shintaro Mochizuki 6-4 6-2

- Qualifier James Duckworth defeated Shang Juncheng 6-3 7-6(3)

- Qualifier Tomás Barrios Vera defeated Gaël Monfils 6-4 4-6 7-6(3)

- Learner Tien defeated qualifier Colton Smith 6-4 7-5

- Reilly Opelka defeated Sebastian Ofner 7-6(6) 7-5

- Qualifier Juan Pablo Ficovich defeated Jacob Fearnley 6-2 6-3

- Qualifier Emilio Nava defeated Zizou Bergs 6-1 7-6(4)

- Qualifier Facundo Bagnis defeated wildcard Vasek Pospisil 6-2 3-6 6-3

- Roman Safiullin defeated qualifier Ugo Blanchet 4-6 6-2 7-6(9)