| Challenger - Mexique | 04/05 22:35 | 25 | [159] Facundo Mena v Barrientos, Nicolas [413] | 1-6,6-2,3-6 | |
| Challenger - Mexique | 04/04 18:55 | 19 | [403] Adrian Andreev v Barrientos, Nicolas [413] | 3-6,4-6 | |
| Challenger - Mexique | 04/03 22:20 | 14 | [438] Lipovsek Puches, Tomas v Barrientos, Nicolas [461] | 4-6,3-6 | |
| Challenger Pereira | 04/01 17:25 | 27 | [104] Facundo Bagnis v Barrientos, Nicolas [461] | 6-2,6-2 | |
| Challenger Pereira | 03/31 15:15 | 26 | [461] Barrientos, Nicolas v Nicolas Kicker [203] | 6-3,3-6,6-3 | |
| Challenger Pereira | 03/29 15:00 | 25 | [231] Alexander Ritschard v Barrientos, Nicolas [461] | 4-6,6-0,2-6 | |
| Challenger - Santa Cruz | 03/23 01:00 | 25 | [277] Genaro Alberto Olivieri v Barrientos, Nicolas [461] | 2-6,7-6,6-2 | |
| Challenger - Santa Cruz | 03/21 21:05 | 19 | [395] Gonzalo Villanueva v Barrientos, Nicolas [474] | 3-6,6-3,2-6 | |
| Challenger - Santa Cruz | 03/20 21:25 | 14 | [281] Boris Arias v Barrientos, Nicolas [474] | 3-6,4-6 | |
| Challenger - Concepcion | 03/14 15:20 | 19 | [333] Daniel Dutra Da Silva v Barrientos, Nicolas [474] | 6-4,7-5 | |
| Challenger - Concepcion | 03/13 16:50 | 14 | [474] Barrientos, Nicolas v Quiroz, Roberto [383] | 6-3,6-7,6-4 | |
| UTR Pro Tennis Series San Antonio | 02/27 17:06 | - | Barrientos, Nicolas v Harrison Adams | 6-4,1-6,6-7 | |
| UTR Pro Tennis Series San Antonio | 02/25 17:30 | - | Barrientos, Nicolas v Morris, Eric | View | |
| UTR Pro Tennis Series San Antonio | 02/24 14:30 | - | Barrientos, Nicolas v Joao Ceolin | 4-6,6-3,5-3 | |
| UTR Pro Tennis Series San Antonio | 02/22 15:00 | - | Barrientos, Nicolas v Grant Lothringer | 7-5,6-4 | |
| UTR Pro Tennis Series San Antonio | 02/21 17:30 | - | Lucas Brown v Barrientos, Nicolas | 1-6,0-6 | |
| Challenger Rio De Janeiro | 12/15 13:00 | 25 | Gabriel Decamps v Barrientos, Nicolas | 6-1,6-4 | |
| Challenger Rio De Janeiro | 12/13 14:30 | 19 | Barrientos, Nicolas v Pedro B Dias | 6-4,6-2 | |
| Challenger Rio De Janeiro | 12/12 16:00 | 14 | Barrientos, Nicolas v Giannella, Joao | 6-1,6-2 | |
| Challenger - Florianopolis | 12/10 15:30 | 27 | [146] Barrientos, Nicolas v Genaro Alberto Olivieri [346] | 2-6,4-6 | |
| Challenger - Florianopolis | 12/09 13:00 | 26 | [146] Barrientos, Nicolas v Gonzalo Villanueva [450] | 7-6,6-1 | |
| Challenger - Florianopolis | 12/07 16:50 | 25 | [232] Juan Pablo Ficovich v Barrientos, Nicolas [146] | 3-6,0-6 | |
| Challenger - Florianopolis | 12/06 14:20 | 19 | [478] Gomez, Alejandro v Barrientos, Nicolas [146] | 4-6,2-6 | |
| Challenger - Florianopolis | 12/05 15:25 | 14 | Victor Tosetto v Barrientos, Nicolas | 1-6,1-6 | |
| Challenger Guayaquil | 11/01 16:00 | 19 | [389] Nicolas Alvarez v Barrientos, Nicolas [162] | 2-6,6-4,6-4 | |
| Challenger Guayaquil | 10/31 18:30 | 14 | [165] Barrientos, Nicolas v Gomez, Alejandro [484] | 7-6,6-4 | |
| Bogota, Colombia | 10/23 15:00 | 28 | [421] Gerald Melzer v Barrientos, Nicolas [172] | 6-2,6-7,6-1 | |
| Bogota, Colombia | 10/22 15:00 | 27 | [172] Barrientos, Nicolas v Oriol Roca Batalla [379] | 6-3,7-5 | |
| Bogota, Colombia | 10/21 15:00 | 26 | [190] Enzo Couacaud v Barrientos, Nicolas [172] | 3-6,4-6 | |
| Bogota, Colombia | 10/19 19:10 | 25 | Barrientos, Nicolas v Juan Sebastian Gomez | 2-6,6-2,6-4 |