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

Frances Tiafoe was the defending champion but chose not to defend his title.
Blaž Kavčič won the title after defeating Peter Polansky 6–3, 2–6, 7–5 in the final.

## Seeds

* Blaž Kavčič (champion)
* Peter Polansky (final)
* Go Soeda (second round)
* Denis Shapovalov (semifinals)
* Jason Jung (first round)
* Vincent Millot (first round)
* Tatsuma Ito (quarterfinals)
* Yasutaka Uchiyama (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 | Final | Final | Final | Final | Final |
| 1 | Blaž Kavčič | 6 | 6 | | | | | |
| | Brayden Schnur | 2 | 2 | | | | | |
| | Brayden Schnur | 2 | 2 | 1 | Blaž Kavčič | 6 | 2 | 7 |
| | | | | 2 | Peter Polansky | 3 | 6 | 5 |
| 4 | Denis Shapovalov | 2 | 5 | 2 | Peter Polansky | 3 | 6 | 5 |
| 2 | Peter Polansky | 6 | 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 |
| 1 | B Kavčič | 6 | 5 | 6 | | | | | | | | | | | | | | |
| | S Bangoura | 4 | 7 | 3 | 1 | B Kavčič | 6 | 7 | | | | | | | | | | |
| | M Polmans | 2 | 4 | | Q | L Broady | 4 | 5 | | | | | | | | | | |
| Q | L Broady | 6 | 6 | | | | | | | 1 | B Kavčič | 6 | 7$^7$ | | | | | |
| Q | K Uchida | 6 | 4 | 4 | | | | | | 7 | T Ito | 1 | 6$^5$ | | | | | |
| | S Diez | 3 | 6 | 6 | | S Diez | 5 | 4 | | | | | | | | | | |
| WC | B Sigouin | 6$^6$ | 6$^4$ | | 7 | T Ito | 7 | 6 | | | | | | | | | | |
| 7 | T Ito | 7$^8$ | 7$^7$ | | | | | | | | | | | | 1 | B Kavčič | 6 | 6 |
| 3 | G Soeda | 3 | 6 | 7$^7$ | | | | | | | | | | | | B Schnur | 2 | 2 |
| | L Harris | 6 | 2 | 6$^5$ | 3 | G Soeda | 4 | 7$^7$ | 5 | | | | | | | | | |
| | B Schnur | 6 | 6 | | | B Schnur | 6 | 6$^5$ | 7 | | | | | | | | | |
| | Y Takahashi | 1 | 2 | | | | | | | | B Schnur | 7$^8$ | 4 | 6 | | | | |
| | H Moriya | 4 | 7 | 4 | | | | | | | M Purcell | 6$^6$ | 6 | 3 | | | | |
| | M Purcell | 6 | 5 | 6 | | M Purcell | 6 | 6 | | | | | | | | | | |
| Q | B Mousley | 7$^7$ | 6 | | Q | B Mousley | 2 | 4 | | | | | | | | | | |
| 6 | V Millot | 6$^4$ | 3 | | | | | | | | | | | | | | | |

### 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 |
| 5 | J Jung | 2 | 2 | | | | | | | | | | | | | | | |
| | M McDonald | 6 | 6 | | | M McDonald | 6 | 6 | | | | | | | | | | |
| | A Sarkissian | 7$^7$ | 2 | 0$^r$ | WC | S Monette | 1 | 1 | | | | | | | | | | |
| WC | Samuel Monette | 6$^4$ | 6 | 1 | | | | | | | M McDonald | 3 | 6 | 3 | | | | |
| | R Quiroz | 7$^7$ | 3 | 1 | | | | | | 4 | D Shapovalov | 6 | 4 | 6 | | | | |
| | Y Bhambri | 6$^4$ | 6 | 6 | | Y Bhambri | 6 | 0 | 3 | | | | | | | | | |
| Q | M Matosevic | 5 | 3 | | 4 | D Shapovalov | 4 | 6 | 6 | | | | | | | | | |
| 4 | D Shapovalov | 7 | 6 | | | | | | | | | | | | 4 | D Shapovalov | 2 | 5 |
| 8 | Y Uchiyama | 6 | 6 | | | | | | | | | | | | 2 | P Polansky | 6 | 7 |
| WC | P Bester | 4 | 4 | | 8 | Y Uchiyama | 6 | 6 | | | | | | | | | | |
| | T Chen | 7 | 6 | | | T Chen | 4 | 4 | | | | | | | | | | |
| Alt | M Torpegaard | 5 | 3 | | | | | | | 8 | Y Uchiyama | 3 | 4 | | | | | |
| PR | A González | 7 | 6 | | | | | | | 2 | P Polansky | 6 | 6 | | | | | |
| | F Peliwo | 5 | 3 | | PR | A González | 4 | 6 | 0 | | | | | | | | | |
| WC | F Dancevic | 6$^4$ | 6$^9$ | | 2 | P Polansky | 6 | 3 | 6 | | | | | | | | | |
| 2 | P Polansky | 7$^7$ | 7$^{11}$ | | | | | | | | | | | | | | | |