| ITF - M25 Hamburgo | 10/20 14:35 | 25 | [265] Nicolas Barrientos v Viktor Durasovic [343] | 3-6,6-4,2-6 | |
| ITF - M25 Hamburgo | 10/19 09:00 | 54 | Lucas Poullain v Nicolas Barrientos | 7-5,6-7,8-10 | |
| ITF - M25 Hamburgo | 10/18 09:00 | 54 | Pelle Boerma v Nicolas Barrientos | 2-6,5-7 | |
| ITF - M25 Plaisir | 09/16 12:00 | 25 | [475] Yannick Mertens v Nicolas Barrientos [262] | 1-6,6-2,6-3 | |
| ITF - M25 Plaisir | 09/14 13:00 | 44 | Nicolas Barrientos v Louis Dussin | 1-6,1-6 | |
| ITF - M25 Plaisir | 09/14 08:00 | 44 | Nicolas Barrientos v Hugo Bron | 6-4,6-4 | |
| ITF - M25 Plaisir | 09/13 12:05 | 44 | Nicolas Barrientos v Antoine Ghibaudo | 6-1,6-1 | |
| ITF - M25 Las Vegas | 03/05 19:25 | 26 | [268] Nicolas Barrientos v Alex Rybakov [481] | 1-6,6-4,4-6 | |
| ITF - M25 Las Vegas | 03/04 20:50 | 25 | Nicolas Barrientos v Micah Braswell | 6-0,6-1 | |
| Challenger - Morelos | 02/17 16:00 | 166 | [226] Ruan Roelofse v Nicolas Barrientos [273] | 6-3,2-6,6-3 | |
| ITF - M25 Naples | 02/11 15:00 | 44 | [241] Alejandro Gomez v Nicolas Barrientos [278] | 6-1,2-6,10-7 | |
| ITF - M25 Naples | 02/10 15:30 | 44 | A.J Catanzariti v Nicolas Barrientos | 2-6,2-6 | |
| ITF - M25 Naples | 02/09 15:00 | 44 | Sebastian Murillo v Nicolas Barrientos | 0-6,3-6 | |
| ITF - M25 Weston | 01/30 15:00 | 26 | Nicolas Barrientos v Wilson Leite | 5-7,0-6 | |
| ITF - M25 Weston | 01/29 16:40 | 25 | Alex Rybakov v Nicolas Barrientos | 6-7,6-3,4-6 | |
| Challenger - Ann Arbor | 01/07 00:40 | 24 | [380] Agustin Velotti v Nicolas Barrientos [335] | 6-4,6-3 | |
| ITF - M15 Santa Marta | 12/08 20:55 | 29 | [280] Alejandro Gomez v Nicolas Barrientos [357] | 4-6,6-1,6-4 | |
| ITF - M15 Santa Marta | 12/07 20:00 | 28 | Juan Sebastian Gomez v Nicolas Barrientos | 4-6,1-6 | |
| ITF - M15 Santa Marta | 12/06 20:00 | 27 | Alejandro Mendoza v Nicolas Barrientos | 4-6,2-6 | |
| ITF - M15 Santa Marta | 12/05 19:30 | 26 | [356] Nicolas Barrientos v Filip C Jianu [426] | Retired | |
| ITF - M15 Santa Marta | 12/03 22:55 | 25 | Federico Juan Aguilar v Nicolas Barrientos | 1-6,3-6 | |
| Challenger - Shenzhen 2 | 10/28 03:45 | 24 | [234] Tung-Lin Wu v Nicolas Barrientos [354] | 6-3,7-5 | |
| Challenger - Liuzhou | 10/22 06:15 | 25 | [90] Prajnesh Gunneswaran v Nicolas Barrientos [348] | 6-2,6-1 | |
| Challenger - Liuzhou | 10/21 04:40 | 24 | [348] Nicolas Barrientos v Fajing Sun [388] | 6-4,3-6,7-6 | |
| Challenger - Ningbo | 10/16 02:00 | 25 | [188] Enrique Lopez-Perez v Nicolas Barrientos [343] | 6-4,6-3 | |
| Challenger - Ningbo | 10/15 02:00 | 24 | [263] Goncalo Oliveira v Nicolas Barrientos [343] | 5-7,0-6 | |
| Challenger - Ningbo | 10/14 02:00 | 166 | Nicolas Barrientos v Aoran Wang | Cancelled | |
| Challenger - Portoroz | 08/13 08:00 | 24 | [412] Nicolas Barrientos v Viktor Durasovic [429] | 2-6,6-3,1-6 | |
| Challenger - Portoroz | 08/12 08:00 | 166 | [437] Alexander Erler v Nicolas Barrientos [412] | 6-3,2-6,2-6 | |
| Challenger - Manerbio | 08/06 08:00 | 24 | Nicolas Barrientos v Fabien Reboul | 4-6,3-6 |