Stadium: Court 2 Round: 46 Ground: Clay
| Challenger Szczecin Qual | 2018/09/08 09:00 | Uzhylovsky, Vladimir v Montero, Jorge | 2-6,0-6 |
| Challenger Seville | 2018/09/01 17:40 | Perez Sanz, David v Montero, Jorge | 6-7,7-6,6-3 |
| ITF USA F22 Qual | 2018/08/06 14:35 | Montero, Jorge v Blumenberg, Alex | 4-6,3-6 |
| ITF USA F22 Qual | 2018/08/05 13:30 | Montero, Jorge v Liu, Yang | 6-2,6-0 |
| ITF Ecuador F2 Qual | 2018/07/30 15:00 | van Meter, Joseph W v Montero, Jorge | 6-1,3-6,6-4 |
| ITF Ecuador F2 Qual | 2018/07/29 15:00 | Montero, Jorge v Brandon Perez | 6-4,6-4 |
| Challenger Lexington Qual | 2018/07/29 14:40 | Thomas Fancutt v Montero, Jorge | 6-4,7-5 |
| Challenger Lexington Qual | 2018/07/28 15:35 | Enzo Wallart v Montero, Jorge | 4-6,7-6,3-6 |
| Challenger Szczecin Qual | 2018/09/08 09:00 | Bury, Aliaksandr v Arguello, Facundo | 2-6,3-6 |
| Challenger Seville | 2018/09/06 18:15 | Kimmer Coppejans v Arguello, Facundo | 6-3,6-7,6-1 |
| Challenger Seville | 2018/09/04 08:30 | Arguello, Facundo v Pedro Cachin | 6-4,6-3 |
| Challenger Como | 2018/09/01 14:30 | Salvatore Caruso v Arguello, Facundo | 6-2,7-6 |
| Challenger Como | 2018/08/30 10:30 | Marcora, Roberto v Arguello, Facundo | 7-6,1-6,3-6 |
| Challenger Como | 2018/08/28 11:00 | Arguello, Facundo v Hugo Dellien | 6-4,6-3 |
| Challenger Como | 2018/08/27 09:00 | Arguello, Facundo v Miljan Zekic | 6-4,3-6,7-6 |
| Challenger Como | 2018/08/26 10:30 | Daniel Masur v Arguello, Facundo | 3-6,1-6 |