Stadium: Jaime Oncins Round: 25 Ground: Clay
| ITF Brazil F7 | 2018/10/29 13:30 | Gilbert S K Junior v Fernando Yamacita | 6-4,6-2 |
| ITF Brazil F7 | 2018/10/31 15:50 | Gilbert S K Junior v Felipe Meligeni Rodrigues Alves | 3-6,4-6 |
| ITF Brazil F7 | 2018/10/29 13:30 | Gilbert S K Junior v Fernando Yamacita | 6-4,6-2 |
| ITF USA F23 | 2018/08/14 16:25 | Nicolas Alvarez v Gilbert S K Junior | 2-6,7-6,6-4 |
| ITF USA F23 Qual | 2018/08/13 15:55 | Alexander Lebedev v Gilbert S K Junior | 6-1,6-3 |
| ITF USA F23 Qual | 2018/08/11 13:00 | Ronald Hohmann v Gilbert S K Junior | 4-6,6-4,6-7 |
| ITF Turkey F13 | 2018/04/06 07:30 | Marsel Ilhan v Gilbert S K Junior | 6-1,6-1 |
| ITF Turkey F13 | 2018/04/05 09:15 | Jaroslav Pospisil v Gilbert S K Junior | 6-4,6-7,5-7 |
| ITF Turkey F13 | 2018/04/03 09:45 | Gilbert S K Junior v Clement Geens | 6-2,6-2 |
| ITF Brazil F7 | 2018/10/29 13:30 | Gilbert S K Junior v Fernando Yamacita | 6-4,6-2 |
| ITF Brazil F6 | 2018/10/22 18:35 | Alejandro Tabilo v Fernando Yamacita | 6-2,7-6 |
| ITF Brazil F5 | 2018/10/16 15:20 | Andre Miele v Fernando Yamacita | 7-6,6-3 |
| Challenger Campinas Qual | 2018/09/30 14:55 | Fabricio Neis v Fernando Yamacita | 7-5,6-4 |
| Challenger Campinas Qual | 2018/09/29 14:50 | Fernando Yamacita v Fernando Romboli | 7-5,6-4 |
| ITF Bolivia F3 | 2018/09/24 18:35 | Fernando Yamacita v Alejandro Mendoza | 7-6,3-6,1-6 |
| ITF Bolivia F2 | 2018/09/17 19:30 | Jorge Panta v Fernando Yamacita | 7-5,6-4 |
| ITF Bolivia F1 | 2018/09/12 19:30 | Fernando Yamacita v Jose Pereira | 3-6,4-6 |