| Challenger Sao Paulo | 2022/07/20 21:00 | Roberto Tadashi Ishikawa v Guilherme Mattos | L | 0-3 |
| Challenger Sao Paulo | 2022/07/09 21:00 | Roberto Tadashi Ishikawa v Guilherme Mattos | L | 2-3 |
| Challenger Sao Paulo | 2022/07/01 22:40 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-2 |
| Challenger Sao Paulo | 2022/06/15 23:20 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-1 |
| Challenger Sao Paulo | 2022/06/08 23:20 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/05/12 22:40 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/04/08 01:40 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-1 |
| Challenger Sao Paulo | 2022/04/07 01:40 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-1 |
| Challenger Sao Paulo | 2022/08/03 22:00 | Roberto Tadashi Ishikawa v Fabio Mizutani | L | 1-3 |
| Challenger Sao Paulo | 2022/08/03 21:20 | Roberto Tadashi Ishikawa v Alejandro Fernandez Junior | L | 0-3 |
| Challenger Sao Paulo | 2022/07/28 02:20 | Roberto Domingues de Andrade v Roberto Tadashi Ishikawa | W | 0-3 |
| Challenger Sao Paulo | 2022/07/28 01:40 | Roberto Tadashi Ishikawa v Lennon Uehara | L | 0-3 |
| Challenger Sao Paulo | 2022/07/28 01:00 | Fabio Mizutani v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/07/28 00:20 | Marco Cruz v Roberto Tadashi Ishikawa | W | 0-3 |
| Challenger Sao Paulo | 2022/07/27 23:40 | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 0-3 |
| Challenger Sao Paulo | 2022/07/27 23:20 | Alejandro Fernandez Junior v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/08/03 21:40 | Guilherme Mattos v Douglas Tomioka | L | 2-3 |
| Challenger Sao Paulo | 2022/08/03 21:00 | Daniel Lacerda v Guilherme Mattos | W | 1-3 |
| Challenger Sao Paulo | 2022/07/22 02:40 | Andre Cruz v Guilherme Mattos | W | 0-3 |
| Challenger Sao Paulo | 2022/07/22 01:40 | Alejandro Fernandez Junior v Guilherme Mattos | L | 3-1 |
| Challenger Sao Paulo | 2022/07/22 01:00 | Guilherme Mattos v Pedro Andrade | W | 3-0 |
| Challenger Sao Paulo | 2022/07/22 00:20 | Fabio Mizutani v Guilherme Mattos | W | 2-3 |
| Challenger Sao Paulo | 2022/07/21 23:00 | Vitor Carlesse Martins v Guilherme Mattos | W | 1-3 |
| Challenger Sao Paulo | 2022/07/21 22:20 | Guilherme Mattos v Douglas Tomioka | L | 0-3 |