2018 Calgary National Bank Challenger
Date	15–21 October
Edition	1st
Surface	Hard (indoor)
Location	Calgary, Canada
Champions
Singles
Ivo Karlović
Doubles
Robert Galloway / Nathan Pasha
Calgary National Bank Challenger · 2020 →

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.

Singles entrants

Seeds

Country	Player	Rank	Seed
AUS	Jordan Thompson	105	1
CRO	Ivo Karlović	117	2
TPE	Jason Jung	123	3
ESP	Adrián Menéndez Maceiras	132	4
NOR	Casper Ruud	137	5
AUS	Alex Bolt	155	6
GBR	Jay Clarke	177	7
ECU	Roberto Quiroz	190	8

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

Champions

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].