2018 Calgary National Bank Challenger

The 2018 Calgary National Bank Challenger was a professional tennis tournament played on indoor hard courts. It was the first edition of the tournament and part of the 2018 ATP Challenger Tour. It took place in Calgary, Canada.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇨🇦 Steven Diez
 * 🇨🇦 Alexis Galarneau
 * 🇨🇦 Pavel Krainik
 * 🇨🇦 Harrison Scott

The following players received entry into the singles main draw as alternates:
 * 🇹🇷 Cem İlkel
 * 🇺🇸 Stefan Kozlov

The following players received entry from the qualifying draw:
 * 🇺🇸 Tom Fawcett
 * Borna Gojo
 * 🇫🇷 Vincent Millot
 * 🇪🇸 Pablo Vivero González

The following player received entry as a lucky loser:
 * 🇫🇷 Laurent Rochette

Singles

 * Ivo Karlović def. 🇦🇺 Jordan Thompson 7–6(7–3), 6–3.

Doubles

 * 🇺🇸 Robert Galloway / 🇺🇸 Nathan Pasha def. 🇦🇺 Matt Reid / 🇦🇺 John-Patrick Smith 6–4, 4–6, [10–6].