# 2017 Challenger Banque Nationale de Gatineau – Men's singles

Peter Polansky was the defending champion but lost in the final to Denis Shapovalov.
Shapovalov won the title after defeating Polansky 6–1, 3–6, 6–3 in the final.

## Seeds

* Malek Jaziri (semifinals)
* Thomas Fabbiano (quarterfinals)
* Blaž Kavčič (second round, retired)
* Go Soeda (second round)
* Peter Polansky (final)
* Jason Jung (first round)
* Denis Shapovalov (champion)
* Vincent Millot (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 | Final |
| 1 | Malek Jaziri | 6 | 1 | 2 | | | | | |
| 5 | Peter Polansky | 4 | 6 | 6 | | | | | |
| 5 | Peter Polansky | 4 | 6 | 6 | 5 | Peter Polansky | 1 | 6 | 3 |
| | | | | | 7 | Denis Shapovalov | 6 | 3 | 6 |
| | Alexander Sarkissian | 3 | 4 | | 7 | Denis Shapovalov | 6 | 3 | 6 |
| 7 | Denis Shapovalov | 6 | 6 | | | | | | |

### 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 | M Jaziri | 6 | 6 | | | | | | | | | | | | | | | | |
| Alt | D Nguyen | 1 | 0 | | 1 | M Jaziri | 6$^4$ | 7$^7$ | 6 | | | | | | | | | | |
| PR | B Klahn | 3 | 6$^5$ | | | B Schnur | 7$^7$ | 6$^2$ | 1 | | | | | | | | | | |
| | B Schnur | 6 | 7$^7$ | | | | | | | 1 | M Jaziri | 6 | 1 | 7 | | | | | |
| WC | L Broady | 6 | 2 | 7 | | | | | | 8 | V Millot | 4 | 6 | 5 | | | | | |
| | B Rola | 2 | 6 | 5 | WC | L Broady | 2 | 6 | 2 | | | | | | | | | | |
| | Z Zhang | 4 | 7 | 2 | 8 | V Millot | 6 | 1 | 6 | | | | | | | | | | |
| 8 | V Millot | 6 | 5 | 6 | | | | | | | | | | | 1 | M Jaziri | 6 | 1 | 2 |
| 4 | G Soeda | 6 | 6 | | | | | | | | | | | | 5 | P Polansky | 4 | 6 | 6 |
| | T Chen | 4 | 4 | | 4 | G Soeda | 2 | 1 | | | | | | | | | | | |
| Q | M Giron | 6 | 6 | | Q | M Giron | 6 | 6 | | | | | | | | | | | |
| WC | F Peliwo | 2 | 0 | | | | | | | Q | M Giron | 6 | 3 | 3 | | | | | |
| | M McDonald | 3 | 0$^r$ | | | | | | | 5 | P Polansky | 3 | 6 | 6 | | | | | |
| Q | JC Aragone | 6 | 1 | | Q | JC Aragone | 6 | 3 | 1 | | | | | | | | | | |
| | H Moriya | 2 | 2 | | 5 | P Polansky | 3 | 6 | 6 | | | | | | | | | | |
| 5 | P Polansky | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | J Jung | 3 | 6$^5$ | | | | | | | | | | | | | | | |
| | Y Uchiyama | 6 | 7$^7$ | | | Y Uchiyama | 4 | 6 | 5 | | | | | | | | | |
| | S Diez | 3 | 2 | | | A Sarkissian | 6 | 4 | 7 | | | | | | | | | |
| | A Sarkissian | 6 | 6 | | | | | | | | A Sarkissian | 6 | 4 | 6 | | | | |
| | Y Bhambri | 6 | 6 | | | | | | | | Y Bhambri | 3 | 6 | 4 | | | | |
| | T Ito | 3 | 2 | | | Y Bhambri | 7$^7$ | 3 | | | | | | | | | | |
| Q | M Torpegaard | 2 | 1 | | 3 | B Kavčič | 6$^1$ | 1$^r$ | | | | | | | | | | |
| 3 | B Kavčič | 6 | 6 | | | | | | | | | | | | | A Sarkissian | 3 | 4 |
| 7 | D Shapovalov | 6 | 3 | 6 | | | | | | | | | | | 7 | D Shapovalov | 6 | 6 |
| WC | P Bester | 3 | 6 | 3 | 7 | D Shapovalov | 6 | 6 | | | | | | | | | | |
| | E Leshem | 1 | 0$^r$ | | Alt | M Purcell | 1 | 2 | | | | | | | | | | |
| Alt | M Purcell | 6 | 0 | | | | | | | 7 | D Shapovalov | 6 | 3 | 6 | | | | |
| WC | B Sigouin | 1 | 3 | | | | | | | 2 | T Fabbiano | 3 | 6 | 3 | | | | |
| Q | S Bangoura | 6 | 6 | | Q | S Bangoura | 5 | 6$^3$ | | | | | | | | | | |
| | O Jasika | 6 | 1 | 1 | 2 | T Fabbiano | 7 | 7$^7$ | | | | | | | | | | |
| 2 | T Fabbiano | 0 | 6 | 6 | | | | | | | | | | | | | | |