Round: 44 Ground: Clay
| ATP San Paolo - 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 |
| ITF USA F5 | 2018/01/21 15:00 | Richard Torres v Fernando Yamacita | 4-6,7-6,0-6 |
| ITF USA F5 | 2018/01/20 14:00 | Bradley Frye v Fernando Yamacita | 4-6,6-7 |
| ITF USA F5 | 2018/01/19 19:00 | Eric Talac v Fernando Yamacita | 0-6,1-6 |
| ITF Brasile F4 | 2017/11/30 13:45 | Oscar Jose Gutierrez v Fernando Yamacita | 6-1,6-4 |
| ITF Brasile F4 | 2017/11/28 13:10 | Eber Tiepermann v Fernando Yamacita | 0-6,1-6 |
| ITF Brasile F1 | 2018/04/21 13:00 | Enrico dos Santos Lima v Rai Vicente de Araujo | 5-7,3-6 |