| Men's singles | |
|---|---|
| 2016 Challenger Banque Nationale de Gatineau | |
| Champion |  Peter Polansky |
| Runner-up |  Vincent Millot |
| Final score | 3–6, 6–4, ret. |
This was the first edition of the men's singles tournament.
Peter Polansky won the title after Vincent Millot retired before the start of the third set in the final.
Quentin Halys (first round)
Frances Tiafoe (withdrew)
Saketh Myneni (quarterfinals)
Alejandro González (first round) Vincent Millot (final, retired)
Franko Škugor (first round)
Andrew Whittington (first round)
Jürgen Zopp (first round)| Semifinals | Final | ||||||||||||
| Peter Polansky | 6 | 710 | |||||||||||
| PR | Matija Pecotić | 4 | 68 | ||||||||||
| Peter Polansky | 3 | 6 | 0 | ||||||||||
| 5 | Vincent Millot | 6 | 4 | 0r | |||||||||
| 5 | Vincent Millot | 6 | 6 | ||||||||||
| WC | Denis Shapovalov | 2 | 4 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | Q Halys | 6 | 4 | 0 | |||||||||||||||||||||||
| Q |  F Tearney | 2 | 6 | 6 | Q | F Tearney | 2 | 3 | |||||||||||||||||||
| Q | F Auger-Aliassime | 2 | 4 | P Polansky | 6 | 6 | |||||||||||||||||||||
| P Polansky | 6 | 6 | P Polansky | 6 | 6 | ||||||||||||||||||||||
 E Corrie | 6 | 3 | 3 | WC | F Peliwo | 2 | 3 | ||||||||||||||||||||
| P Bester | 2 | 6 | 6 | P Bester | 6 | 3 | 1 | ||||||||||||||||||||
| WC | F Peliwo | 62 | 6 | 77 | WC | F Peliwo | 2 | 6 | 6 | ||||||||||||||||||
| 7 | A Whittington | 77 | 2 | 60 | P Polansky | 6 | 710 | ||||||||||||||||||||
| 4 | A González | 2 | 3 | PR | M Pecotić | 4 | 68 | ||||||||||||||||||||
| PR | M Pecotić | 6 | 6 | PR | M Pecotić | 3 | 7 | 6 | |||||||||||||||||||
| G Barrère | 64 | 0 |  M Arévalo | 6 | 5 | 1 | |||||||||||||||||||||
| M Arévalo | 77 | 6 | PR | M Pecotić | 6 | 6 | |||||||||||||||||||||
| Q |  LD Martínez | 3 | 4 |  G Clezar | 3 | 4 | |||||||||||||||||||||
| J-P Smith | 6 | 6 | J-P Smith | 6 | 3 | 4 | |||||||||||||||||||||
| G Clezar | 3 | 6 | 6 | G Clezar | 4 | 6 | 6 | ||||||||||||||||||||
| 6 | F Škugor | 6 | 4 | 3 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | V Millot | 6 | 6 | ||||||||||||||||||||||||
 H Moriya | 3 | 4 | 5 | V Millot | 64 | 6 | 6 | ||||||||||||||||||||
| B Klein | 6 | 6 | B Klein | 77 | 1 | 4 | |||||||||||||||||||||
 A Golubev | 2 | 3 | 5 | V Millot | 77 | 6 | |||||||||||||||||||||
| WC | A Tabilo | 2 | 0 | 3 | S Myneni | 65 | 1 | ||||||||||||||||||||
| B Mott | 6 | 6 | B Mott | 3 | 2 | ||||||||||||||||||||||
| L Saville | 5 | 0 | 3 | S Myneni | 6 | 6 | |||||||||||||||||||||
| 3 | S Myneni | 7 | 6 | 5 | V Millot | 6 | 6 | ||||||||||||||||||||
| 8 | J Zopp | 4 | 2 | WC | D Shapovalov | 2 | 4 | ||||||||||||||||||||
| F Dancevic | 6 | 6 | F Dancevic | 6 | 7 | ||||||||||||||||||||||
| WC | B Schnur | 1 | 2 | Q | G Jones | 4 | 5 | ||||||||||||||||||||
| Q | G Jones | 6 | 6 | F Dancevic | 1 | 5 | |||||||||||||||||||||
| LL | Pavel Krainik | 3 | 65 | WC | D Shapovalov | 6 | 7 | ||||||||||||||||||||
| T Lamasine | 6 | 77 | T Lamasine | 64 | 2 | ||||||||||||||||||||||
| WC | D Shapovalov | 7 | 7 | WC | D Shapovalov | 77 | 6 | ||||||||||||||||||||
| LL | Samuel Monette | 5 | 5 | ||||||||||||||||||||||||
Robin Söderling was the defending champion, but he decided not to compete this year.
Giovanni Lapentti was the title defender, but he retired in the semifinal, when the result was 3–6 for Vincent Millot.
Horacio Zeballos won in the final 3–6, 7–5, 6–3, against Vincent Millot.
Jo-Wilfried Tsonga successfully defended his title, defeating Andreas Seppi in the final, 6–1, 6–2.
Jo-Wilfried Tsonga was the two-time defending champion but lost in the final to Gilles Simon, 4–6, 3–6.
Grigor Dimitrov was the defending champion, but lost to Tomáš Berdych in the final, 5–7, 6–4, 6–4.
Hiroki Moriya was the defending champion, but decided not to participate this year.
David Goffin was the defending champion but chose not to participate this year.
Gilles Simon was the defending champion, but lost in the first round to Teymuraz Gabashvili.
Andy Murray was the defending champion, but chose not to participate this year.
Kei Nishikori was the defending champion, but chose not to participate this year.
Second-seeded Gaël Monfils won the title, defeating Ivo Karlović in the final: 5–7, 7–6(8–6), 6–4.
Vincent Millot was the defending champion, but lost in the second round to James McGee.
Jo-Wilfried Tsonga was the defending champion, but withdrew with a left knee injury before the tournament began.
Illya Marchenko was the defending champion but lost in the second round to Vincent Millot.
This was the first edition of the tournament.
Richard Gasquet was the two-time defending champion, but lost to Alexander Zverev in the final, 6–7(4–7), 3–6.
Nick Kyrgios was the defending champion, but lost in the semifinals to Jo-Wilfried Tsonga.
Lucas Pouille defeated Feliciano López in the final, 4–6, 7–6(7–5), 6–4 to win the singles tennis title at the 2017 Stuttgart Open. Pouille saved a match point en route to the title, in the second round against Jan-Lennard Struff.
Peter Polansky was the defending champion but lost in the final to Denis Shapovalov.
Lucas Pouille was the defending champion, but lost in the second round to Marius Copil.
Alexander Zverev was the defending champion and successfully defended his title, defeating Alex de Minaur in the final, 6–2, 6–4.