# 2018 Calgary National Bank Challenger – Singles

This was the first edition of the tournament.
Ivo Karlović won the title after defeating Jordan Thompson 7–6$^{(7–3)}$, 6–3 in the final.

## Seeds

* Jordan Thompson (final)
* Ivo Karlović (champion)
* Jason Jung (second round)
* Adrián Menéndez Maceiras (second round)
* Casper Ruud (semifinals)
* Alex Bolt (withdrew)
* Jay Clarke (first round)
* Roberto Quiroz (quarterfinals)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 1 | Jordan Thompson | 6$^5$ | 6 | 7$^7$ | | | | |
| 5 | Casper Ruud | 7$^7$ | 0 | 6$^4$ | | | | |
| 5 | Casper Ruud | 7$^7$ | 0 | 6$^4$ | 1 | Jordan Thompson | 6$^3$ | 3 |
| | | | | | 2 | Ivo Karlović | 7$^7$ | 6 |
| Q | Borna Gojo | 6$^3$ | 6$^2$ | | 2 | Ivo Karlović | 7$^7$ | 6 |
| 2 | Ivo Karlović | 7$^7$ | 7$^7$ | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | J Thompson | 6 | 7$^7$ | | | | | | | | | | | | | | | | |
| LL | Laurent Rochette | 2 | 6$^5$ | | 1 | J Thompson | 6 | 6 | | | | | | | | | | | |
| WC | A Galarneau | 6 | 6 | | WC | A Galarneau | 2 | 0 | | | | | | | | | | | |
| Q | Pablo Vivero González | 2 | 4 | | | | | | | 1 | J Thompson | 6 | 6 | | | | | | |
| | E Couacaud | 6 | 4 | 6 | | | | | | | E Couacaud | 3 | 4 | | | | | | |
| | R Ortega Olmedo | 2 | 6 | 3 | | E Couacaud | 7 | 7 | | | | | | | | | | | |
| | J-P Smith | 7$^7$ | 7$^7$ | | | J-P Smith | 5 | 5 | | | | | | | | | | | |
| Q | T Fawcett | 6$^4$ | 6$^3$ | | | | | | | | | | | | 1 | J Thompson | 6$^5$ | 6 | 7$^7$ |
| 4 | A Menéndez Maceiras | 4 | 7 | 7 | | | | | | | | | | | 5 | C Ruud | 7$^7$ | 0 | 6$^4$ |
| | K King | 6 | 5 | 5 | 4 | A Menéndez Maceiras | 6 | 2 | 6$^4$ | | | | | | | | | | |
| | B Schnur | 4 | 6 | 6 | | B Schnur | 4 | 6 | 7$^7$ | | | | | | | | | | |
| | T Robredo | 6 | 1 | 4 | | | | | | | B Schnur | 6 | 3 | 4 | | | | | |
| Alt | S Kozlov | 3 | 3 | | | | | | | 5 | C Ruud | 4 | 6 | 6 | | | | | |
| | J Choinski | 6 | 6 | | | J Choinski | 3 | 2 | | | | | | | | | | | |
| | A González | 6 | 5 | 6$^3$ | 5 | C Ruud | 6 | 6 | | | | | | | | | | | |
| 5 | C Ruud | 3 | 7 | 7$^7$ | | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | J Clarke | 5 | 0 | | | | | | | | | | | | | | | |
| | C Altamirano | 7 | 6 | | | C Altamirano | 7 | 6$^6$ | 1 | | | | | | | | | |
| WC | Pavel Krainik | 4 | 6 | 3 | | F Peliwo | 5 | 7$^8$ | 6 | | | | | | | | | |
| | F Peliwo | 6 | 3 | 6 | | | | | | | F Peliwo | 0 | 3 | | | | | |
| WC | Harrison Scott | 0 | 1 | | | | | | | Q | B Gojo | 6 | 6 | | | | | |
| Q | B Gojo | 6 | 6 | | Q | B Gojo | 7$^7$ | 6 | | | | | | | | | | |
| WC | S Diez | 3 | 7$^7$ | 3 | 3 | J Jung | 6$^2$ | 2 | | | | | | | | | | |
| 3 | J Jung | 6 | 6$^0$ | 6 | | | | | | | | | | | Q | B Gojo | 6$^3$ | 6$^2$ |
| 8 | R Quiroz | 1 | 7 | 6 | | | | | | | | | | | 2 | I Karlović | 7$^7$ | 7$^7$ |
| Q | V Millot | 6 | 5 | 1 | 8 | R Quiroz | 6 | 6 | | | | | | | | | | |
| Alt | C İlkel | 7 | 7 | | Alt | C İlkel | 4 | 3 | | | | | | | | | | |
| | N Serdarušić | 5 | 5 | | | | | | | 8 | R Quiroz | 6$^4$ | 6 | 6$^4$ | | | | |
| | M Bourgue | 6$^3$ | 6 | 6 | | | | | | 2 | I Karlović | 7$^7$ | 4 | 7$^7$ | | | | |
| | K Uchida | 7$^7$ | 2 | 2 | | M Bourgue | 6$^4$ | 6 | 3 | | | | | | | | | |
| | E King | 6$^5$ | 7$^8$ | 6$^3$ | 2 | I Karlović | 7$^7$ | 4 | 6 | | | | | | | | | |
| 2 | I Karlović | 7$^7$ | 6$^6$ | 7$^7$ | | | | | | | | | | | | | | |