| Challenger - Quimper | 02/02 18:50 | 25 | [223] Viola, Matteo v Maxime Janvier [212] | 5-7,2-6 | |
| Challenger Quimper Qual | 02/01 11:15 | 19 | Viola, Matteo v Evgeny Karlovskiy | 6-4,6-2 | |
| Challenger Quimper Qual | 01/31 14:15 | 14 | Viola, Matteo v Luca Van Assche | 6-2,6-3 | |
| Open d'Australie | 01/11 12:10 | 60 | [220] Viola, Matteo v Nikola Milojevic [138] | 4-6,4-6 | |
| Challenger Ortisei | 11/17 14:10 | 25 | [222] Viola, Matteo v Ilya Ivashka [113] | 1-6,1-6 | |
| Challenger Bratislava | 11/13 13:50 | 27 | [215] Tomas Machac v Viola, Matteo [232] | 6-2,6-4 | |
| Challenger Bratislava | 11/12 09:00 | 26 | [232] Viola, Matteo v Nikola Milojevic [136] | 7-6,4-6,6-3 | |
| Challenger Bratislava | 11/10 12:55 | 25 | [355] Jiri Lehecka v Viola, Matteo [232] | 6-2,4-6,6-7 | |
| Challenger Parma 2 | 11/04 14:45 | 26 | [211] Quentin Halys v Viola, Matteo [233] | 4-6,6-3,7-6 | |
| Challenger Parma 2 | 11/02 11:25 | 25 | [232] Viola, Matteo v Dmitry Popko [172] | Retired | |
| Challenger Ismaning | 10/21 12:40 | 26 | [134] Antoine Hoang v Viola, Matteo [231] | 6-2,3-6,6-3 | |
| Challenger Ismaning | 10/19 12:00 | 25 | [202] Brandon Nakashima v Viola, Matteo [230] | 6-4,3-6,4-6 | |
| ATP Sardinia | 10/10 09:30 | 64 | [99] Federico Coria v Viola, Matteo [229] | 6-2,1-6,7-6 | |
| Challenger Biella | 10/03 10:30 | 27 | [148] Rola, Blaz v Viola, Matteo [229] | 6-2,7-5 | |
| Challenger Biella | 09/30 10:00 | 26 | Remy Bertola v Viola, Matteo | 1-6,5-7 | |
| Challenger Biella | 09/28 12:00 | 25 | [229] Viola, Matteo v Federico Gaio [132] | 4-6,7-6,6-2 | |
| French Open, Paris, France | 09/22 08:00 | 14 | [226] Viola, Matteo v Jurij Rodionov [178] | 4-6,6-7 | |
| ATP - Rome | 09/13 12:00 | 19 | [106] Pedro Martinez v Viola, Matteo [224] | 4-6,6-2,6-4 | |
| ATP - Rome | 09/12 18:15 | 14 | [224] Viola, Matteo v Soonwoo Kwon [73] | 7-6,1-6,7-6 | |
| Cordenons, Italy | 09/01 11:25 | 25 | Andrea Collarini v Viola, Matteo | 6-0,6-1 | |
| Challenger Trieste | 08/26 14:00 | 26 | [222] Viola, Matteo v Carlos Alcaraz [310] | 4-6,2-6 | |
| Challenger Trieste | 08/24 14:00 | - | [152] Lorenzo Giustino v Viola, Matteo [222] | 4-6,2-6 | |
| Challenger Todi | 08/17 18:30 | - | [130] Federico Gaio v Viola, Matteo [222] | 3-6,6-3,7-5 | |
| Challenger - Pau | 02/25 10:45 | 25 | [224] Viola, Matteo v Quentin Halys [193] | 1-6,2-6 | |
| Challenger - Pau | 02/24 11:45 | 24 | [224] Viola, Matteo v Bernabe Zapata Miralles [213] | 6-3,6-4 | |
| Bergamo, Italy | 02/18 14:35 | 25 | [217] Viola, Matteo v Raul Brancaccio [377] | 4-6,4-6 | |
| Challenger - Cherbourg | 02/12 17:20 | 25 | Viola, Matteo v Jules Marie | 3-6,6-3,6-7 | |
| Open d'Australie | 01/18 00:00 | 46 | [231] Viola, Matteo v Alejandro Tabilo [208] | 2-6,3-6 | |
| Open d'Australie | 01/16 07:30 | 45 | [201] Maxime Janvier v Viola, Matteo [231] | 6-7,4-6 | |
| Open d'Australie | 01/14 05:45 | 44 | [231] Viola, Matteo v Nicola Kuhn [209] | Retired |