| Challenger de Acapulco | 04/17 22:00 | 26 | [314] Adolfo Daniel Vallejo v Alexis Galarneau [170] | 6-7,1-6 | |
| Challenger de Acapulco | 04/16 02:25 | 25 | [466] Ernesto Escobedo v Adolfo Daniel Vallejo [314] | 4-6,0-6 | |
| Challenger Florianópolis | 04/02 18:30 | 25 | [312] Adolfo Daniel Vallejo v Roman Andres Burruchaga [151] | 3-6,4-6 | |
| Challenger de São Leopoldo | 03/31 16:30 | 29 | [231] Enzo Couacaud v Adolfo Daniel Vallejo [472] | 3-6,2-6 | |
| Challenger de São Leopoldo | 03/30 19:25 | 28 | [134] Felipe M R Alves v Adolfo Daniel Vallejo [472] | 4-6,6-3,0-6 | |
| Challenger de São Leopoldo | 03/29 19:05 | 27 | [472] Adolfo Daniel Vallejo v Orlando Luz [371] | 6-3,6-1 | |
| Challenger de São Leopoldo | 03/28 14:00 | 26 | [185] Genaro Alberto Olivieri v Adolfo Daniel Vallejo [472] | 1-6,4-6 | |
| Challenger de São Leopoldo | 03/25 18:00 | 25 | [472] Adolfo Daniel Vallejo v Liam Draxl [257] | 6-2,5-7,7-5 | |
| Challenger de Asunción | 03/20 20:40 | 26 | [472] Adolfo Daniel Vallejo v Roman Andres Burruchaga [161] | 4-6,7-6,2-6 | |
| Challenger de Asunción | 03/19 21:40 | 25 | [264] Renzo Olivo v Adolfo Daniel Vallejo [472] | Retired | |
| Challenger de Santa Cruz | 03/04 22:30 | 25 | [127] Camilo Ugo Carabelli v Adolfo Daniel Vallejo [463] | Retired | |
| ITF M25 Tucumán | 02/28 15:15 | 25 | Joaquin Aguillar Cardozo v Daniel Vallejo | 7-6,6-1 | |
| ITF M25 Punta del Este | 02/15 13:00 | 26 | [467] Juan Bautista Otegui v Adolfo Daniel Vallejo [491] | 3-6,6-1,6-2 | |
| ITF M25 Punta del Este | 02/14 13:00 | 25 | [491] Adolfo Daniel Vallejo v Eduardo Ribeiro [401] | 6-1,7-5 | |
| ITF M25 Punta del Este | 02/10 13:00 | 28 | [293] Murkel Dellien v Daniel Vallejo [490] | 6-4,4-6,6-4 | |
| ITF M25 Punta del Este | 02/09 14:00 | 27 | [311] Alvaro G Meza v Daniel Vallejo [490] | 6-1,2-6,1-6 | |
| ITF M25 Punta del Este | 02/08 12:55 | 26 | [490] Daniel Vallejo v Matheus P De Almeida [317] | 5-7,6-3,6-1 | |
| ITF M25 Punta del Este | 02/07 15:45 | 25 | Daniel Vallejo v Wilson Leite | 6-2,6-0 | |
| Copa Davis | 02/04 20:55 | 4 | [479] Adolfo Daniel Vallejo v Valentin Vacherot [171] | 7-6,4-6,4-6 | |
| Challenger Buenos Aires | 01/08 15:15 | 19 | [472] Adolfo Daniel Vallejo v Gonzalo Villanueva [440] | 2-6,4-6 | |
| Challenger Buenos Aires | 01/07 15:15 | 14 | [376] Federico Agustin Gomez v Adolfo Daniel Vallejo [472] | 7-6,1-6,1-6 | |
| Challenger de Brasilia | 11/19 15:45 | 14 | Fernando Romboli v Adolfo Daniel Vallejo | 3-6,6-3,7-6 | |
| Challenger de Montevideo | 11/12 20:10 | 14 | [448] Adolfo Daniel Vallejo v Alvaro G Meza [339] | 6-3,4-6,6-7 | |
| Challenger de Lima | 11/07 19:00 | 25 | [109] Alejandro Tabilo v Adolfo Daniel Vallejo [448] | 6-4,6-1 | |
| Challenger de Santa Fe | 10/17 13:00 | 25 | [122] Vit Kopriva v Adolfo Daniel Vallejo [461] | 6-0,0-6,6-3 | |
| Challenger de Santa Fe | 10/16 15:50 | 19 | [461] Adolfo Daniel Vallejo v Gonzalo Lama [407] | 6-1,6-2 | |
| Challenger de Santa Fe | 10/15 16:05 | 14 | [296] Renzo Olivo v Adolfo Daniel Vallejo [454] | 1-6,1-6 | |
| Challenger Buenos Aires | 10/08 13:00 | 14 | [266] Murkel Dellien v Adolfo Daniel Vallejo [454] | 7-6,5-7,6-0 | |
| Challenger de Antofagasta | 09/18 17:00 | 25 | [306] Matheus P De Almeida v Adolfo Daniel Vallejo [447] | 6-2,2-6,6-1 | |
| Challenger de Santa Cruz | 09/13 00:35 | 25 | Juan C P Angelo v Adolfo Daniel Vallejo | 6-3,6-1 |