| Challenger Sao Paulo | 2022/03/31 01:40 | Guilherme Mattos v Jefferson Silva | L | 0-3 |
| Challenger Sao Paulo | 2022/03/31 00:40 | Guilherme Mattos v Carlos Alberto Torres Ferraz | L | 0-3 |
| Challenger Sao Paulo | 2022/03/31 00:00 | Guilherme Mattos v De Hong Jung | W | 3-1 |
| Challenger Sao Paulo | 2022/03/30 23:20 | Yokoyama, Hiromi v Guilherme Mattos | W | 0-3 |
| Challenger Sao Paulo | 2022/03/30 22:40 | Guilherme Mattos v Thiago Vieira | L | 1-3 |
| Challenger Sao Paulo | 2022/03/30 22:00 | Guilherme Mattos v Manuel Freitas Chambel Paiva | L | 1-3 |
| Challenger Sao Paulo | 2022/03/30 21:20 | Guilherme Mattos v Alejandro Fernandez Junior | L | 0-3 |
| Challenger Sao Paulo | 2022/03/27 02:40 | Gustavo Jeremias Morais v Guilherme Mattos | L | 3-1 |