2018 Challenger Banque Nationale de Granby

The 2018 Challenger Banque Nationale de Granby was a professional tennis tournament played on outdoor hard courts. It was the twenty-fifth (ATP) and eighth (ITF) editions of the tournament and was part of the 2018 ATP Challenger Tour and the 2018 ITF Women's Circuit. It took place in Granby, Canada, on 23–29 July 2018.

Seeds

 * 1 Rankings are as of 16 July 2018.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇨🇦 Alexis Galarneau
 * 🇨🇦 Pavel Krainik
 * 🇨🇦 Samuel Monette
 * 🇨🇦 Benjamin Sigouin

The following players received entry from the qualifying draw:
 * 🇧🇪 Joris De Loore
 * 🇦🇺 Dayne Kelly
 * 🇦🇹 Lucas Miedler
 * 🇹🇭 Wishaya Trongcharoenchaikul

The following players received entry as lucky losers:
 * Takanyi Garanganga
 * 🇦🇺 Jacob Grills

Seeds

 * 1 Rankings as of 16 July 2018.

Other entrants
The following players received a wildcard into the singles main draw:
 * 🇨🇦 Isabelle Boulais
 * 🇨🇦 Jada Bui
 * 🇨🇦 Leylah Annie Fernandez
 * 🇨🇦 Tiffany Lagarde

The following players received entry from the qualifying draw:
 * 🇬🇧 Freya Christie
 * 🇯🇵 Nagi Hanatani
 * 🇬🇧 Samantha Murray
 * 🇯🇵 Akiko Omae

Men's singles

 * 🇨🇦 Peter Polansky def. 🇫🇷 Ugo Humbert 6–4, 1–6, 6–2

Women's singles

 * 🇮🇱 Julia Glushko def. 🇦🇺 Arina Rodionova 6–4, 6–3

Men's doubles

 * 🇺🇸 Alex Lawson / 🇨🇳 Li Zhe def. 🇺🇸 JC Aragone / 🇬🇧 Liam Broady 7–6(7–2), 6–3.

Women's doubles

 * 🇦🇺 Ellen Perez / 🇦🇺 Arina Rodionova def. 🇯🇵 Erika Sema / 🇯🇵 Aiko Yoshitomi, 7–5, 6–4