| Challenger Da Nang | 01/12 04:30 | 29 | [110] Marcel Granollers v Matteo Viola [289] | 6-2,6-0 | |
| Challenger Da Nang | 01/11 06:00 | 28 | [275] Thai-Son Kwiatkowski v Matteo Viola [289] | 7-5,6-7,2-6 | |
| Challenger Da Nang | 01/10 05:00 | 27 | [389] Yan Bai v Matteo Viola [289] | 3-6,6-7 | |
| Challenger Da Nang | 01/09 07:30 | 26 | [376] Benjamin Hassan v Matteo Viola [289] | 4-6,1-6 | |
| Challenger Da Nang | 01/07 08:00 | 25 | [419] Wishaya Trongcharoenchaikul v Matteo Viola [289] | 6-4,3-6,4-6 | |
| Challenger Andria | 11/20 17:45 | 25 | [294] Matteo Viola v Sergiy Stakhovsky [140] | 1-6,5-7 | |
| Challenger Bratislava | 11/04 12:20 | 46 | [271] Matteo Viola v Johannes Haerteis [490] | 3-6,6-7 | |
| Challenger Bratislava | 11/03 14:05 | 45 | [271] Matteo Viola v Marek Gengel [312] | 6-2,6-1 | |
| Challenger Ismaning | 10/19 12:00 | 27 | [296] Matteo Viola v Ugo Humbert [99] | 1-6,2-6 | |
| Challenger Ismaning | 10/17 11:00 | 26 | [224] James Ward v Matteo Viola [296] | 5-7,6-1,6-7 | |
| Challenger Ismaning | 10/16 11:00 | 25 | [327] Vaclav Safranek v Matteo Viola [296] | 4-6,2-6 | |
| Challenger Barcelona | 10/11 10:50 | 26 | [293] Matteo Viola v Miljan Zekic [278] | 4-6,5-7 | |
| Challenger Barcelona | 10/10 10:00 | 25 | [308] David Guez v Matteo Viola [293] | 6-7,3-6 | |
| Challenger Sibiu | 09/18 12:10 | 25 | [284] Matteo Viola v Nino Serdarusic [228] | 2-6,7-6,1-6 | |
| Challenger Istanbul | 09/14 13:25 | 27 | [123] Thomas Fabbiano v Matteo Viola [297] | 3-6,6-2,6-4 | |
| Challenger Istanbul | 09/13 08:00 | 26 | [297] Matteo Viola v Constant Lestienne [172] | 6-3,6-1 | |
| Challenger Istanbul | 09/10 09:30 | 25 | [311] Denis Yevseyev v Matteo Viola [297] | 6-7,4-6 | |
| Challenger Cassis | 09/03 09:00 | 46 | Matteo Viola v Tak Khunn Wang | 6-0,5-7,5-7 | |
| Challenger Como | 08/25 10:45 | 45 | [304] Miljan Zekic v Matteo Viola [295] | 6-2,6-4 | |
| Challenger Cordenons | 08/14 10:00 | 25 | [291] Matteo Viola v Facundo Bagnis [153] | 0-6,2-6 | |
| Challenger Segovia | 08/02 10:20 | 26 | [303] Matteo Viola v Roberto Quiroz [226] | 5-7,5-7 | |
| Challenger Segovia | 07/31 14:10 | 25 | [117] Sergiy Stakhovsky v Matteo Viola [303] | 3-6,6-2,6-7 | |
| Challenger Padova | 07/24 19:20 | 25 | [277] Matteo Viola v Tommy Robredo [242] | 6-1,1-6,1-6 | |
| Challenger San Benedetto | 07/20 17:00 | 27 | [233] Sergio Gutierrez-Ferrol v Matteo Viola [294] | 6-1,6-0 | |
| Challenger San Benedetto | 07/19 18:10 | 26 | [294] Matteo Viola v Joao Domingues [250] | 2-6,6-3,6-3 | |
| Challenger San Benedetto | 07/17 15:05 | 25 | [294] Matteo Viola v Pietro Rondoni [388] | 7-6,6-2 | |
| ATP Eastbourne Qual | 06/24 10:00 | 164 | [78] Alex De Minaur v Matteo Viola [270] | 6-2,6-4 | |
| ATP Eastbourne Qual | 06/23 11:15 | 64 | [296] Andrew Whittington v Matteo Viola [270] | 6-4,4-6,2-6 | |
| Challenger Poprad Tatry | 06/19 11:15 | 25 | [206] Attila Balazs v Matteo Viola [270] | 6-3,6-3 | |
| ATP Stuttgart | 06/12 09:00 | 25 | [55] Gilles Simon v Matteo Viola [281] | 6-0,6-3 |