# 2018 Challenger Banque Nationale de Drummondville – Singles

Denis Shapovalov was the defending champion but chose not to defend his title.
Denis Kudla won the title after defeating Benjamin Bonzi 6–0, 7–5 in the final.

## Seeds

* Vasek Pospisil (semifinals)
* Henri Laaksonen (second round)
* Gleb Sakharov (first round, retired)
* Liam Broady (first round)
* Denis Kudla (champion)
* Filip Peliwo (second round)
* Evan King (quarterfinals)
* Brayden Schnur (semifinals)

## 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 | Vasek Pospisil | 5 | 6 | 1 | | | | |
| | Benjamin Bonzi | 7 | 3 | 6 | | | | |
| | Benjamin Bonzi | 7 | 3 | 6 | | Benjamin Bonzi | 0 | 5 |
| | | | | | 5 | Denis Kudla | 6 | 7 |
| 8 | Brayden Schnur | 4 | 2 | | 5 | Denis Kudla | 6 | 7 |
| 5 | Denis Kudla | 6 | 6 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | V Pospisil | 7 | 6 | | | | | | | | | | | | | | | |
| | A Pavić | 5 | 3 | | 1 | V Pospisil | 7$^7$ | 7 | | | | | | | | | | |
| WC | B Sigouin | 1 | 6 | 4 | Alt | N Scholtz | 6$^2$ | 5 | | | | | | | | | | |
| Alt | N Scholtz | 6 | 2 | 6 | | | | | 1 | V Pospisil | 7$^7$ | 6 | | | | | | |
| WC | Pavel Krainik | 6 | 5 | 2 | | | | | 7 | E King | 6$^4$ | 4 | | | | | | |
| | D Köpfer | 3 | 7 | 6 | | D Köpfer | 4 | 6$^6$ | | | | | | | | | | |
| Q | A Vukic | 6$^1$ | 4 | | 7 | E King | 6 | 7$^8$ | | | | | | | | | | |
| 7 | E King | 7$^7$ | 6 | | | | | | | | | | | 1 | V Pospisil | 5 | 6 | 1 |
| 4 | L Broady | 6 | 4 | 6$^3$ | | | | | | | | | | | B Bonzi | 7 | 3 | 6 |
| LL | JC Aragone | 4 | 6 | 7$^7$ | LL | JC Aragone | 7 | 6 | | | | | | | | | | |
| WC | Samuel Monette | 6 | 6 | | WC | S Monette | 5 | 4 | | | | | | | | | | |
| Q | R Roelofse | 3 | 4 | | | | | | LL | JC Aragone | 7$^7$ | 2 | 0 | | | | | |
| | B Bonzi | 6 | 5 | 7 | | | | | | B Bonzi | 6$^5$ | 6 | 6 | | | | | |
| | V Millot | 4 | 7 | 5 | | B Bonzi | 6 | 7$^7$ | | | | | | | | | | |
| Alt | A González | 3 | 6 | 3 | 6 | F Peliwo | 4 | 6$^3$ | | | | | | | | | | |
| 6 | F Peliwo | 6 | 4 | 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 |
| 8 | B Schnur | 7$^7$ | 6 | | | | | | | | | | | | | | |
| PR | M Przysiężny | 6$^3$ | 2 | | 8 | B Schnur | 6 | 6 | | | | | | | | | |
| | C Harrison | 6 | 6$^5$ | 7$^7$ | | C Harrison | 4 | 3 | | | | | | | | | |
| | J-P Smith | 0 | 7$^7$ | 6$^4$ | | | | | | 8 | B Schnur | w/o | | | | | |
| WC | JM Lin | 5 | 1 | | | | | | | PR | F Dancevic | | | | | | |
| PR | F Dancevic | 7 | 6 | | PR | F Dancevic | 7$^8$ | 6 | | | | | | | | | |
| | C Lestienne | 6 | 0 | | | C Lestienne | 6$^6$ | 2 | | | | | | | | | |
| 3 | G Sakharov | 3 | 0$^r$ | | | | | | | | | | | 8 | B Schnur | 4 | 2 |
| 5 | D Kudla | 1 | 6 | 6 | | | | | | | | | | 5 | D Kudla | 6 | 6 |
| Q | A Escoffier | 6 | 3 | 4 | 5 | D Kudla | 6 | 5 | 6 | | | | | | | | |
| | F Škugor | 6 | 3 | 3$^r$ | Alt | J De Loore | 3 | 7 | 2 | | | | | | | | |
| Alt | J De Loore | 3 | 6 | 4 | | | | | | 5 | D Kudla | 6 | 6 | | | | |
| | N Kuhn | 4 | 3 | | | | | | | LL | J Hiltzik | 2 | 1 | | | | |
| LL | Jared Hiltzik | 6 | 6 | | LL | J Hiltzik | 6 | 6 | | | | | | | | | |
| Q | A Gómez | 4 | 5 | | 2 | H Laaksonen | 4 | 4 | | | | | | | | | |
| 2 | H Laaksonen | 6 | 7 | | | | | | | | | | | | | | |