| Men's doubles | |
|---|---|
| 2018 Challenger Banque Nationale de Granby | |
| Champions |  Alex Lawson  Li Zhe | 
| Runners-up |  JC Aragone  Liam Broady | 
| Score | 7–6(7–2), 6–3 | 
Joe Salisbury and Jackson Withrow were the defending champions but chose not to defend their title.
Alex Lawson and Li Zhe won the title after defeating JC Aragone and Liam Broady 7–6(7–2), 6–3 in the final.
 Matt Reid /
  Matt Reid /   Yasutaka Uchiyama (semifinals)
  Yasutaka Uchiyama (semifinals) Bradley Mousley /
  Bradley Mousley /   Maximilian Neuchrist (first round)
  Maximilian Neuchrist (first round) Alex Lawson /
  Alex Lawson /   Li Zhe (champions)
  Li Zhe (champions) JC Aragone /
  JC Aragone /   Liam Broady (final)
  Liam Broady (final)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 |  M Reid  Y Uchiyama | 6 | 3 | [10] | |||||||||||||||||||||||
|  F Dancevic  P Polansky | 6 | 63 | [10] |  F Dancevic  P Polansky | 3 | 6 | [7] | ||||||||||||||||||||
| WC |  T Baadi  J Boulais | 3 | 77 | [6] | 1 |  M Reid  Y Uchiyama | 3 | 6 | [4] | ||||||||||||||||||
| 4 |  JC Aragone  L Broady | 4 | 6 | [11] | 4 |  JC Aragone  L Broady | 6 | 3 | [10] | ||||||||||||||||||
|  Shintaro Imai  K Uchida | 6 | 4 | [9] | 4 |  JC Aragone  L Broady | w/o | |||||||||||||||||||||
|  A Galarneau  B Sigouin | w/o |  A Galarneau  B Sigouin | |||||||||||||||||||||||||
|  T Fawcett  Tyler Lu | 4 |  JC Aragone  L Broady | 62 | 3 | |||||||||||||||||||||||
|  L Johnson  J Menezes | 6 | 3 | [10] | 3 |  A Lawson  Z Li | 77 | 6 | ||||||||||||||||||||
| WC |  JM Lin  Nicaise Muamba | 4 | 6 | [7] |  L Johnson  J Menezes | 79 | 1 | [9] | |||||||||||||||||||
| WC |  Washi Gervais  K Stevenson | 4 | 3 | 3 |  A Lawson  Z Li | 67 | 6 | [11] | |||||||||||||||||||
| 3 |  A Lawson  Z Li | 6 | 6 | 3 |  A Lawson  Z Li | 6 | 4 | [10] | |||||||||||||||||||
|  Pavel Krainik  Samuel Monette | 4 | 65 |  J De Loore  N Gombos | 2 | 6 | [6] | |||||||||||||||||||||
|  J De Loore  N Gombos | 6 | 77 |  J De Loore  N Gombos | 6 | 79 | ||||||||||||||||||||||
|  J Frawley  Jacob Grills | 6 | 6 |  J Frawley  J Grills | 1 | 67 | ||||||||||||||||||||||
| 2 |  B Mousley  M Neuchrist | 2 | 3 | ||||||||||||||||||||||||