2015 Challenger Banque Nationale de Granby – Men's singles

Hiroki Moriya was the defending champion, but decided not to participate this year.

Vincent Millot won the title, defeating Philip Bester 6–4, 6–4 in the final.

Seeds
• #🇩🇪 Benjamin Becker (first round)

• #🇸🇰 Lukáš Lacko (first round)

• #🇯🇵 Go Soeda (second round)

• #🇯🇵 Yoshihito Nishioka (semifinals)

• #🇦🇺 John-Patrick Smith (withdrew)

• #🇧🇪 Maxime Authom (first round, retired)

• #🇮🇹 Matteo Donati (semifinals)

• # Darian King (second round)