| Challenger Sao Paulo | 2022/04/08 02:40 | Vitor Carlesse Martins v Roberto Tadashi Ishikawa | W | 1-3 |
| Challenger Sao Paulo | 2022/04/08 01:40 | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-1 |
| Challenger Sao Paulo | 2022/04/08 01:00 | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 1-3 |
| Challenger Sao Paulo | 2022/04/08 00:20 | Fabio Mizutani v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/04/07 23:00 | Leandro Nogueira Carvalho v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/04/07 22:20 | Roberto Tadashi Ishikawa v Hiromi Yokoyama | W | 3-1 |
| Challenger Sao Paulo | 2022/04/07 22:00 | Roberto Tadashi Ishikawa v Alejandro Fernandez Junior | L | 0-3 |
| Challenger Sao Paulo | 2022/04/07 21:00 | Roberto Tadashi Ishikawa v Rogerio Capobianco | W | 3-0 |