Stadium: Cancha Central Round: 26 Ground: Clay
| Challenger Campinas | 2018/09/30 15:30 | Montero, Jorge v Miele, Andre | 4-6,6-3,3-6 |
| ITF Spain F28 | 2018/09/18 11:00 | Montero, Jorge v Pol Martin Tiffon | 3-6,6-3,2-6 |
| Challenger Szczecin | 2018/09/09 09:00 | Montero, Jorge v Arguello, Facundo | 6-2,3-6,2-6 |
| 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 Chile F1 | 2018/11/12 16:00 | Kohl, Cristopher v Martinez, Mirko | 6-7,0-6 |
| ITF Turkey F33 | 2018/10/25 07:00 | Martinez, Mirko v Gennaro, Dante | 3-6,2-6 |
| ITF Turkey F33 | 2018/10/23 07:00 | Martinez, Mirko v Benjamin Winter Lopez | 6-1,6-2 |
| ITF Switzerland F5 | 2018/09/04 14:30 | Martinez, Mirko v Staeheli, Luca | 7-6,6-7,5-7 |
| ITF Switzerland F5 | 2018/09/03 08:50 | Martinez, Mirko v Nicolas Parizzia | 6-3,6-3 |
| ITF Switzerland F5 | 2018/09/02 11:30 | Martinez, Mirko v Kaelin, Yanik | 6-2,6-1 |
| ITF Switzerland F4 | 2018/08/28 16:10 | Matteo Martineau v Martinez, Mirko | 6-2,6-0 |
| ITF Switzerland F3 | 2018/08/22 09:30 | Martinez, Mirko v Juan Pablo Ficovich | 6-7,1-6 |