Stadium: Center Court Round: 25 Ground: Clay
| ITF Brazil F4 | 2017/11/30 13:45 | Oscar Jose Gutierrez v Fernando Yamacita | 6-1,6-4 |
| ITF Brazil F1 | 2018/04/27 17:00 | Camilo Ugo Carabelli v Oscar Jose Gutierrez | 4-6,6-3,6-1 |
| ITF Brazil F1 | 2018/04/25 15:30 | Alexandre Tsuchiya v Oscar Jose Gutierrez | 4-6,7-6,2-6 |
| ITF Brazil F1 | 2018/04/23 19:15 | Igor Marcondes v Oscar Jose Gutierrez | 6-2,2-6,3-6 |
| ITF Turkey F12 | 2018/03/29 13:00 | Oscar Jose Gutierrez v Dimitar Kuzmanov | 3-6,1-6 |
| ITF Turkey F12 | 2018/03/28 08:40 | Marvin Netuschil v Oscar Jose Gutierrez | 4-6,0-6 |
| ITF Turkey F11 | 2018/03/21 09:10 | Oscar Jose Gutierrez v Juan Pablo Varillas | 3-6,1-6 |
| ITF Turkey F10 | 2018/03/17 07:30 | Oscar Jose Gutierrez v Ivan Nedelko | 1-6,7-5,0-6 |
| ITF Turkey F10 | 2018/03/16 07:30 | Oscar Jose Gutierrez v Mikhail Korovin | 6-3,2-6,6-4 |
| ITF Brazil F2 | 2018/04/30 15:00 | Fernando Yamacita v Luis Britto | 6-1,6-2 |
| ITF Brazil F2 | 2018/04/29 17:30 | Fernando Yamacita v Pedro F Maciel | 6-2,6-3 |
| ITF Brazil F1 | 2018/04/24 18:30 | Alexandre Tsuchiya v Fernando Yamacita | 6-4,6-2 |
| ITF Brazil F1 | 2018/04/23 13:00 | Fernando Yamacita v Alexandre G R Girotto | 6-3,6-4 |
| ITF Brazil F1 | 2018/04/22 13:00 | Fernando Yamacita v Rai Vicente de Araujo | 5-7,6-2,6-1 |
| ATP Sao Paulo Qual | 2018/02/24 19:20 | Fernando Yamacita v Guilherme Clezar | 1-6,6-7 |
| ITF USA F6 | 2018/01/27 15:00 | Fernando Yamacita v Paul Oosterbaan | 6-1,5-7,6-7 |
| ITF USA F5 | 2018/01/24 17:35 | Juan Manuel Benitez Chavarriaga v Fernando Yamacita | 6-4,6-3 |