# 2018 Winnipeg National Bank Challenger – Men's singles

Blaž Kavčič was the defending champion but chose not to defend his title.
Jason Kubler won the title after defeating Lucas Miedler 6–1, 6–1 in the final.

## Seeds

* Peter Polansky (second round)
* Marcel Granollers (semifinals)
* Michael Mmoh (second round)
* Jason Kubler (champion)
* Tatsuma Ito (first round)
* Go Soeda (semifinals)
* Filip Peliwo (second round)
* Brayden Schnur (first round)

## 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 |
| | Lucas Miedler | 6 | 3 | 6 | | | | |
| 6 | Go Soeda | 3 | 6 | 3 | | | | |
| 6 | Go Soeda | 3 | 6 | 3 | | Lucas Miedler | 1 | 1 |
| | | | | | 4 | Jason Kubler | 6 | 6 |
| 4 | Jason Kubler | 4 | 7 | 6 | 4 | Jason Kubler | 6 | 6 |
| 2 | Marcel Granollers | 6 | 5 | 3 | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | P Polansky | 7$^7$ | 7$^7$ | | | | | | | | | | | | | | | |
| WC | Pavel Krainik | 6$^1$ | 6$^5$ | | 1 | P Polansky | 6$^4$ | 7 | 1 | | | | | | | | | |
| | Y Uchiyama | 3 | 1$^r$ | | | L Miedler | 7$^7$ | 5 | 6 | | | | | | | | | |
| | L Miedler | 6 | 4 | | | | | | | | L Miedler | 7$^7$ | 6 | | | | | |
| | Renta Tokuda | 5 | 5 | | | | | | | | K Uchida | 6$^4$ | 4 | | | | | |
| | K Uchida | 7 | 7 | | | K Uchida | 6$^3$ | 6 | 6 | | | | | | | | | |
| WC | B Sigouin | 6 | 4 | 3 | 7 | F Peliwo | 7$^7$ | 1 | 2 | | | | | | | | | |
| 7 | F Peliwo | 0 | 6 | 6 | | | | | | | | | | | L Miedler | 6 | 3 | 6 |
| 3 | M Mmoh | 6$^2$ | 6 | 7 | | | | | | | | | | 6 | G Soeda | 3 | 6 | 3 |
| | B Mousley | 7$^7$ | 4 | 5 | 3 | M Mmoh | 7$^7$ | 1 | 1 | | | | | | | | | |
| WC | A Galarneau | 6$^2$ | 7$^8$ | 6 | WC | A Galarneau | 6$^3$ | 6 | 6 | | | | | | | | | |
| | Z Li | 7$^7$ | 6$^6$ | 3 | | | | | | WC | A Galarneau | 0 | 2 | | | | | |
| WC | David Volfson | 3 | 3 | | | | | | | 6 | G Soeda | 6 | 6 | | | | | |
| Q | Y-s Chung | 6 | 6 | | Q | Y-s Chung | 2 | 6 | 4 | | | | | | | | | |
| | L Grigelis | 3 | 0 | | 6 | G Soeda | 6 | 2 | 6 | | | | | | | | | |
| 6 | G Soeda | 6 | 6 | | | | | | | | | | | | | | | |

### 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 | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 5 | T Ito | 6$^4$ | 2 | | | | | | | | | | | | | | | |
| Q | M-A Hüsler | 7$^7$ | 6 | | Q | M-A Hüsler | 6 | 7$^8$ | | | | | | | | | | |
| | A Escoffier | 1 | 6 | 7$^8$ | | A Escoffier | 4 | 6$^6$ | | | | | | | | | | |
| | J Menezes | 6 | 2 | 6$^6$ | | | | | | Q | M-A Hüsler | 2 | 3 | | | | | |
| | D Köpfer | 6 | 6 | | | | | | | 4 | J Kubler | 6 | 6 | | | | | |
| | S Napolitano | 4 | 3 | | | D Köpfer | 1 | 2 | | | | | | | | | | |
| | Y Takahashi | 2 | 2 | | 4 | J Kubler | 6 | 6 | | | | | | | | | | |
| 4 | J Kubler | 6 | 6 | | | | | | | | | | | 4 | J Kubler | 4 | 7 | 6 |
| 8 | B Schnur | 2 | 4 | | | | | | | | | | | 2 | M Granollers | 6 | 5 | 3 |
| | F Dancevic | 6 | 6 | | | F Dancevic | 6 | 3 | 4 | | | | | | | | | |
| Q | M Torpegaard | 6 | 6 | | Q | M Torpegaard | 3 | 6 | 6 | | | | | | | | | |
| | A Bega | 3 | 3 | | | | | | | Q | M Torpegaard | 4 | 1 | | | | | |
| | E Leshem | 4 | 6 | 1 | | | | | | 2 | M Granollers | 6 | 6 | | | | | |
| Q | Evan Song | 6 | 1 | 6 | Q | E Song | 2 | 1 | | | | | | | | | | |
| | A Harris | 3 | 4 | | 2 | M Granollers | 6 | 6 | | | | | | | | | | |
| 2 | M Granollers | 6 | 6 | | | | | | | | | | | | | | | |