stadio: Centre Court 1 Ground: Clay
| ATP San Paolo - Qual. | 2018/02/24 17:25 | Tommy Robredo v Pedro Sakamoto | 6-7,4-6 |
| ATP Quito - Qual. | 2018/02/04 17:00 | Andrej Martin v Pedro Sakamoto | 6-4,6-4 |
| ATP Quito - Qual. | 2018/02/03 16:00 | Pedro Sakamoto v Daniel Munoz-De La Nava | 3-6,6-4,6-4 |
| ITF USA F6 | 2018/01/30 16:00 | Junior Alexander Ore v Pedro Sakamoto | 5-7,6-4,7-6 |
| ITF USA F5 | 2018/01/26 15:30 | Pedro Sakamoto v Roberto Cid Subervi | 0-6,1-6 |
| ITF USA F5 | 2018/01/25 16:50 | Pedro Sakamoto v Eros Siringo | 6-3,6-3 |
| ITF USA F5 | 2018/01/23 15:00 | Pedro Sakamoto v Louis Wessels | 6-4,7-6 |
| ITF USA F4 | 2018/01/20 16:50 | Pedro Sakamoto v Julien Cagnina | 1-6,4-6 |
| ATP San Paolo - Qual. | 2018/02/24 19:20 | Fernando Yamacita v Guilherme Clezar | 1-6,6-7 |
| ATP Rio de Janeiro - Qual. | 2018/02/17 18:00 | Guilherme Clezar v Alessandro Giannessi | 7-6,4-6,3-6 |
| ATP Buenos Aires - Qual. | 2018/02/11 16:00 | Rogerio Dutra Silva v Guilherme Clezar | 7-6,7-6 |
| ATP Buenos Aires - Qual. | 2018/02/10 14:00 | Guilherme Clezar v Renzo Olivo | 7-5,6-0 |
| ATP Quito - Qual. | 2018/02/03 16:00 | Gonzalo Escobar v Guilherme Clezar | 6-7,7-6,6-4 |
| Challenger Newport Beach | 2018/01/22 19:55 | Guilherme Clezar v Stefan Kozlov | 2-6,3-6 |
| Challenger - Rio De Janeiro | 2017/11/24 19:00 | Carlos Berlocq v Guilherme Clezar | 7-5,6-1 |
| Challenger - Rio De Janeiro | 2017/11/23 14:00 | Christian Lindell v Guilherme Clezar | 3-6,0-6 |