2018 Coupe Banque Nationale

The 2018 Coupe Banque Nationale is a tennis tournament played on indoor carpet courts. It was the 26th edition of the Tournoi de Québec and part of the WTA International tournaments of the 2018 WTA Tour. It took place at the PEPS de l'Université Laval in Quebec City, Canada, from September 10 through September 16, 2018.

Seeds

 * 1 Rankings are as of August 27, 2018

Other entrants
The following players received wildcards into the singles main draw:
 * 🇨🇦 Françoise Abanda
 * 🇨🇦 Leylah Annie Fernandez
 * 🇨🇦 Rebecca Marino

The following player entered the singles main draw with a protected ranking:
 * 🇧🇾 Olga Govortsova

The following players received entry from the qualifying draw:
 * 🇨🇿 Marie Bouzková
 * 🇨🇦 Gabriela Dabrowski
 * 🇺🇸 Victoria Duval
 * 🇧🇬 Sesil Karatantcheva
 * 🇨🇿 Tereza Martincová
 * 🇺🇸 Jessica Pegula

Withdrawals

 * Before the tournament
 * 🇷🇺 Anna Blinkova → replaced by 🇷🇺 Veronika Kudermetova
 * 🇺🇸 Danielle Collins → replaced by 🇬🇧 Naomi Broady
 * 🇷🇸 Olga Danilović → replaced by 🇹🇳 Ons Jabeur
 * 🇷🇺 Vitalia Diatchenko → replaced by 🇺🇸 Madison Brengle
 * 🇷🇺 Margarita Gasparyan → replaced by 🇧🇷 Beatriz Haddad Maia
 * 🇷🇺 Anastasia Pavlyuchenkova → replaced by 🇬🇧 Heather Watson
 * 🇨🇳 Peng Shuai → replaced by 🇩🇪 Mona Barthel
 * 🇺🇸 Sachia Vickery → replaced by Georgina García Pérez

Seeds

 * 1 Rankings are as of August 20, 2018

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇨🇦 Leylah Annie Fernandez / 🇨🇦 Sharon Fichman
 * 🇨🇦 Carson Branstine / 🇨🇦 Rebecca Marino

Singles

 * 🇫🇷 Pauline Parmentier def. 🇺🇸 Jessica Pegula 7–5, 6–2

Doubles

 * 🇺🇸 Asia Muhammad / 🇺🇸 Maria Sanchez def. Darija Jurak /  Xenia Knoll 6–4, 6–3