| Challenger Sao Paulo | 2022/05/13 01:20 | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 0-3 |
| Challenger Sao Paulo | 2022/05/08 02:20 | Douglas Tomioka v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/04/28 22:20 | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 0-3 |
| Challenger Sao Paulo | 2022/04/21 01:40 | Douglas Tomioka v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/04/17 00:20 | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 1-3 |
| Challenger Sao Paulo | 2022/04/08 01:00 | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 1-3 |
| Challenger Sao Paulo | 2022/05/25 23:20 | Roberto Tadashi Ishikawa v Allan Sarmento | L | 0-3 |
| Challenger Sao Paulo | 2022/05/25 22:40 | Marco Cruz v Roberto Tadashi Ishikawa | W | 1-3 |
| Challenger Sao Paulo | 2022/05/25 22:00 | Rodrigo Procidonio Ruiz v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/05/25 21:20 | Alejandro Fernandez Junior v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/05/22 02:20 | Alejandro Fernandez Junior v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/05/22 02:00 | Roberto Tadashi Ishikawa v Leandro Nogueira Carvalho | L | 0-3 |
| Challenger Sao Paulo | 2022/05/22 01:20 | Roberto Tadashi Ishikawa v Jocimar Silva | W | 3-0 |
| Challenger Sao Paulo | 2022/05/22 00:00 | Roberto Tadashi Ishikawa v Hiromi Yokoyama | W | 3-0 |
| Challenger Sao Paulo | 2022/05/26 00:40 | Alejandro Fernandez Junior v Douglas Tomioka | W | 1-3 |
| Challenger Sao Paulo | 2022/05/25 23:40 | Allan Sarmento v Douglas Tomioka | L | 3-2 |
| Challenger Sao Paulo | 2022/05/25 23:00 | Fabio Mizutani v Douglas Tomioka | W | 1-3 |
| Challenger Sao Paulo | 2022/05/25 22:20 | Rodrigo Procidonio Ruiz v Douglas Tomioka | W | 0-3 |
| Challenger Sao Paulo | 2022/05/25 21:40 | Lennon Uehara v Douglas Tomioka | W | 1-3 |
| Challenger Sao Paulo | 2022/05/15 02:20 | Douglas Tomioka v Renato Rezende | W | 3-0 |
| Challenger Sao Paulo | 2022/05/15 01:40 | Douglas Tomioka v Julio Silva | W | 3-0 |
| Challenger Sao Paulo | 2022/05/15 00:40 | Douglas Tomioka v Jonas Silva | W | 3-0 |