Stadium: Centre Court Round: 27 Ground: Clay
| ITF M15 Recife | 2021/09/22 13:00 | Christian Oliveira v Oscar Jose Gutierrez | 3-6,0-6 |
| ITF M15 Brasilia | 2021/11/04 12:55 | Wilson Leite v Christian Oliveira | 6-7,2-6 |
| ITF M15 Brasilia | 2021/11/02 15:00 | Iago Almeida v Christian Oliveira | 2-6,4-6 |
| ITF M25 Rio do Sul | 2021/10/19 13:55 | Franco Roncadelli v Christian Oliveira | 6-1,6-1 |
| ITF M15 Recife | 2021/09/22 13:00 | Christian Oliveira v Oscar Jose Gutierrez | 3-6,0-6 |
| ITF M15 Sao Paulo | 2019/10/16 14:00 | Conner Huertas Del Pino v Christian Oliveira | 6-3,6-3 |
| ITF M15 Sao Paulo | 2019/10/15 16:45 | Christian Oliveira v Gaston Erhardt | 7-6,6-3 |
| ITF M25 Rio de Janeiro | 2019/10/11 15:35 | Christian Oliveira v Felipe Meligeni Rodrigues Alves | 2-6,4-6 |
| ITF M25 Rio de Janeiro | 2019/10/08 17:30 | Christian Oliveira v Mauricio Echazu | 6-1,4-6,6-3 |
| ITF M15 Brasilia | 2021/11/04 13:00 | Dali Blanch v Oscar Jose Gutierrez | 3-6,4-6 |
| ITF M15 Brasilia | 2021/11/03 15:50 | Joao Eduardo Schiessl v Oscar Jose Gutierrez | 3-6,5-7 |
| ITF M25 Rio do Sul | 2021/10/21 16:10 | Nicolas Zanellato v Oscar Jose Gutierrez | 6-7,6-1,6-1 |
| ITF M25 Rio do Sul | 2021/10/20 16:40 | Amnon Felipe v Oscar Jose Gutierrez | 0-6,4-6 |
| ITF M25 Lima | 2021/10/12 16:20 | Franco Roncadelli v Oscar Jose Gutierrez | 6-0,7-6 |
| ITF M25 Lima | 2021/10/09 15:00 | Oscar Jose Gutierrez v Daniel Dutra Da Silva | 5-7,7-5,4-6 |
| ITF M25 Lima | 2021/10/08 19:10 | Oscar Jose Gutierrez v Conner Huertas Del Pino | 6-3,7-5 |
| ITF M25 Lima | 2021/10/07 17:55 | Oscar Jose Gutierrez v Boris Arias | 6-1,6-4 |