Stadium: Centre Court Round: 28 Ground: Clay
| ITF Argentina F1 | 2017/06/07 12:30 | Nicolas Santos v Oscar Jose Gutierrez | 2-6,6-2,5-7 |
| ITF Colombia F4 | 2016/10/06 15:00 | Oscar Jose Gutierrez v Nicolas Santos | 3-6,7-5,6-7 |
| ITF Brazil F2 | 2016/07/07 17:00 | Oscar Jose Gutierrez v Nicolas Santos | 6-4,6-3 |
| ITF Brazil F3 | 2018/05/11 22:45 | Christian Lindell v Nicolas Santos | 4-6,2-6 |
| ITF Brazil F3 | 2018/05/09 16:40 | Asdrubal Gobernate v Nicolas Santos | 4-6,2-6 |
| ITF Brazil F3 | 2018/05/07 15:30 | Nicolas Santos v Wilson Leite | 6-2,6-4 |
| ITF Brazil F2 | 2018/05/02 15:00 | Carlos E. Severino v Nicolas Santos | 7-6,6-3 |
| ITF Brazil F1 | 2018/04/26 01:30 | Nicolas Santos v Christian Lindell | 6-7,4-6 |
| ITF Brazil F1 | 2018/04/25 23:00 | Nicolas Santos v Christian Lindell | 6-7,4-5 |
| ITF Brazil F1 | 2018/04/23 23:35 | Nicolas Santos v Mateus Alves | 6-3,6-4 |
| ITF Turkey F9 | 2018/03/05 07:00 | Nicolas Santos v Gabi Adrian Boitan | 3-6,3-6 |
| ITF Brazil F3 | 2018/05/11 18:25 | Pedro Sakamoto v Oscar Jose Gutierrez | 5-7,6-4,3-6 |
| ITF Brazil F3 | 2018/05/10 15:30 | Mateus Alves v Oscar Jose Gutierrez | 2-6,2-6 |
| ITF Brazil F3 | 2018/05/08 15:55 | Andre Miele v Oscar Jose Gutierrez | 3-6,4-6 |
| ITF Brazil F2 | 2018/05/05 18:05 | Gonzalo Villanueva v Oscar Jose Gutierrez | 6-7,6-3,6-3 |
| ITF Brazil F2 | 2018/05/05 00:25 | Oscar Jose Gutierrez v Pedro Sakamoto | 6-3,2-6,6-3 |
| ITF Brazil F2 | 2018/05/02 18:10 | Oscar Jose Gutierrez v Joao Lucas Reis da Silva | 6-4,6-3 |
| ITF Brazil F2 | 2018/05/01 15:00 | Oscar Jose Gutierrez v Fernando Yamacita | 6-4,6-0 |
| ITF Brazil F1 | 2018/04/27 17:00 | Camilo Ugo Carabelli v Oscar Jose Gutierrez | 4-6,6-3,6-1 |