| Challenger Sao Paulo | 05/13 23:20 | - | Roberto Tadashi Ishikawa v Antonio Neto | W | 3-0 | |
| Challenger Sao Paulo | 05/13 22:40 | - | Vinicius Girotto v Roberto Tadashi Ishikawa | W | 0-3 | |
| Challenger Sao Paulo | 05/13 22:00 | - | Hiromi Yokoyama v Roberto Tadashi Ishikawa | W | 1-3 | |
| Challenger Sao Paulo | 05/13 21:20 | - | Jefferson Silva v Roberto Tadashi Ishikawa | W | 1-3 | |
| Challenger Sao Paulo | 05/13 02:20 | - | Vitor Carlesse Martins v Roberto Tadashi Ishikawa | W | 0-3 | |
| Challenger Sao Paulo | 05/13 02:00 | - | Roberto Tadashi Ishikawa v Marcio Sasaki | L | 0-3 | |
| Challenger Sao Paulo | 05/13 01:20 | - | Roberto Tadashi Ishikawa v Douglas Tomioka | L | 0-3 | |
| Challenger Sao Paulo | 05/13 00:00 | - | Roberto Tadashi Ishikawa v Newton Takaki | L | 2-3 | |
| Challenger Sao Paulo | 05/12 23:20 | - | Roberto Tadashi Ishikawa v Silnei Yuta | L | 2-3 | |
| Challenger Sao Paulo | 05/12 22:40 | - | Guilherme Mattos v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 05/12 22:00 | - | Alejandro Fernandez Junior v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 05/12 21:20 | - | Pedro Andrade v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 05/08 02:20 | - | Douglas Tomioka v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 05/08 01:40 | - | Roberto Tadashi Ishikawa v Alejandro Fernandez Junior | W | 3-2 | |
| Challenger Sao Paulo | 05/08 01:00 | - | Lennon Uehara v Roberto Tadashi Ishikawa | L | 3-2 | |
| Challenger Sao Paulo | 05/08 00:20 | - | Diogo Silva v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 05/07 23:40 | - | Roberto Tadashi Ishikawa v De Hong Jung | L | 2-3 | |
| Challenger Sao Paulo | 05/07 23:20 | - | Everton Vianna v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 05/07 22:20 | - | Roberto Tadashi Ishikawa v Alexandre Tamaoki | W | 3-0 | |
| Challenger Sao Paulo | 05/07 02:20 | - | Jefferson Silva v Roberto Tadashi Ishikawa | W | 2-3 | |
| Challenger Sao Paulo | 05/07 01:40 | - | Roberto Tadashi Ishikawa v Jocimar Silva | W | 3-0 | |
| Challenger Sao Paulo | 05/07 01:00 | - | Fernando Santos v Roberto Tadashi Ishikawa | W | 0-3 | |
| Challenger Sao Paulo | 05/07 00:20 | - | Marco Cruz v Roberto Tadashi Ishikawa | W | 0-3 | |
| Challenger Sao Paulo | 05/06 23:40 | - | Roberto Tadashi Ishikawa v Alexandre Tamaoki | W | 3-0 | |
| Challenger Sao Paulo | 05/06 23:20 | - | Luciano Martins Vieira Junior v Roberto Tadashi Ishikawa | W | 2-3 | |
| Challenger Sao Paulo | 05/06 22:20 | - | Roberto Tadashi Ishikawa v Leandro Nogueira Carvalho | L | 0-3 | |
| Challenger Sao Paulo | 05/06 21:20 | - | Roberto Tadashi Ishikawa v Geraldo Iqueuti | W | 3-0 | |
| Challenger Sao Paulo | 04/29 02:40 | - | Alejandro Fernandez Junior v Roberto Tadashi Ishikawa | L | 3-1 | |
| Challenger Sao Paulo | 04/29 01:40 | - | Carlos Alberto Torres Ferraz v Roberto Tadashi Ishikawa | L | 3-0 | |
| Challenger Sao Paulo | 04/29 01:00 | - | Roberto Tadashi Ishikawa v Newton Takaki | L | 2-3 |