# 2013 Challenger Banque Nationale de Granby – Men's singles

Vasek Pospisil was the defending champion but chose to compete at the 2013 Claro Open Colombia.
Frank Dancevic defeated first seed Lukáš Lacko 6–4, 6–7$^{(4–7)}$, 6–3 in the final.

## Seeds

* Lukáš Lacko (final)
* Nicolas Mahut (second round)
* Tatsuma Ito (quarterfinals)
* Maxime Authom (first round)
* Matt Reid (second round)
* Frank Dancevic (champion)
* Hiroki Moriya (semifinals)
* Steven Diez (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 | Final | Final | Final | Final | Final |
| 1 | Lukáš Lacko | 6 | 6 | | | | | |
| 7 | Hiroki Moriya | 3 | 3 | | | | | |
| 7 | Hiroki Moriya | 3 | 3 | 1 | Lukáš Lacko | 4 | 7$^7$ | 3 |
| | | | | 6 | Frank Dancevic | 6 | 6$^4$ | 6 |
| 6 | Frank Dancevic | 6 | 7 | 6 | Frank Dancevic | 6 | 6$^4$ | 6 |
| WC | Philip Bester | 4 | 5 | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | L Lacko | 6 | 6 | | | | | | | | | | | | | |
| WC | Hugo Di Feo | 1 | 2 | | 1 | L Lacko | 6 | 6 | | | | | | | | |
| | T Androić | 4 | 4 | | | A Bossel | 1 | 2 | | | | | | | | |
| | A Bossel | 6 | 6 | | | | | | 1 | L Lacko | 6 | 6 | | | | |
| | É Chvojka | 3 | 6 | 2 | | | | | | J Ward | 3 | 2 | | | | |
| | J Ward | 6 | 3 | 6 | | J Ward | 6 | 6 | | | | | | | | |
| | M Barton | 6 | 5 | 1 | 5 | M Reid | 3 | 4 | | | | | | | | |
| 5 | M Reid | 3 | 7 | 6 | | | | | | | | | 1 | L Lacko | 6 | 6 |
| 3 | T Ito | 7$^7$ | 6 | | | | | | | | | | 7 | H Moriya | 3 | 3 |
| Q | B Mott | 6$^3$ | 3 | | 3 | T Ito | 6 | 7$^7$ | | | | | | | | |
| | A Pavić | 2 | 5 | | | H Kondo | 3 | 6$^2$ | | | | | | | | |
| | H Kondo | 6 | 7 | | | | | | 3 | T Ito | 6$^3$ | 4 | | | | |
| | L Saville | 6$^7$ | 6 | 1 | | | | | 7 | H Moriya | 7$^7$ | 6 | | | | |
| | C Reix | 7 | 2 | 6 | | C Reix | 0 | 5 | | | | | | | | |
| WC | B Schnur | 6$^4$ | 5 | | 7 | H Moriya | 6 | 7 | | | | | | | | |
| 7 | H Moriya | 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 |
| 6 | F Dancevic | 7$^7$ | 6 | | | | | | | | | | | | | | | |
| | A El Mihdawy | 6$^3$ | 1 | | 6 | F Dancevic | 6 | 6 | | | | | | | | | | |
| | J Hernández | 4 | 3 | | | R Borvanov | 2 | 2 | | | | | | | | | | |
| | R Borvanov | 6 | 6 | | | | | | | 6 | F Dancevic | 6 | 6 | | | | | |
| | F Peliwo | 6 | 6$^4$ | 6 | | | | | | WC | F Peliwo | 4 | 1 | | | | | |
| | Y Uchiyama | 4 | 7$^7$ | 4 | WC | F Peliwo | 3 | 6 | 6 | | | | | | | | | |
| | P Polansky | 7$^7$ | 6 | | | P Polansky | 6 | 4 | 4 | | | | | | | | | |
| 4 | M Authom | 6$^5$ | 2 | | | | | | | | | | | | 6 | F Dancevic | 6 | 7 |
| 8 | S Diez | 5 | 1 | | | | | | | | | | | | WC | P Bester | 4 | 5 |
| | B Mitchell | 7 | 6 | | | B Mitchell | 6 | 6 | | | | | | | | | | |
| | D Beretta | 3 | 7$^8$ | 3 | Q | P Krainik | 2 | 2 | | | | | | | | | | |
| Q | Pavel Krainik | 6 | 6$^6$ | 6 | | | | | | | B Mitchell | 6 | 3 | 4 | | | | |
| WC | P Bester | 6 | 6 | | | | | | | WC | P Bester | 4 | 6 | 6 | | | | |
| Q | Tyler Hochwalt | 4 | 2 | | WC | P Bester | 6 | 3 | 6 | | | | | | | | | |
| Q | Milan Pokrajac | 7$^7$ | 2 | 3 | 2 | N Mahut | 4 | 6 | 1 | | | | | | | | | |
| 2 | N Mahut | 6$^5$ | 6 | 6 | | | | | | | | | | | | | | |