| Challenger Sao Paulo | 2022/05/22 00:00 | Roberto Tadashi Ishikawa v Hiromi Yokoyama | L | 3-0 |
| Challenger Sao Paulo | 2022/05/19 02:40 | Hiromi Yokoyama v Roberto Tadashi Ishikawa | W | 3-2 |
| Challenger Sao Paulo | 2022/05/13 22:00 | Hiromi Yokoyama v Roberto Tadashi Ishikawa | L | 1-3 |
| Challenger Sao Paulo | 2022/04/17 00:00 | Hiromi Yokoyama v Roberto Tadashi Ishikawa | L | 1-3 |
| Challenger Sao Paulo | 2022/04/15 01:40 | Hiromi Yokoyama v Roberto Tadashi Ishikawa | L | 2-3 |
| Challenger Sao Paulo | 2022/04/07 22:20 | Roberto Tadashi Ishikawa v Hiromi Yokoyama | L | 3-1 |
| Challenger Sao Paulo | 2022/04/06 22:20 | Roberto Tadashi Ishikawa v Hiromi Yokoyama | L | 3-1 |
| Challenger Sao Paulo | 2022/06/12 00:20 | Hiromi Yokoyama v Marco Cruz | L | 2-3 |
| Challenger Sao Paulo | 2022/06/11 23:40 | Everton Vianna v Hiromi Yokoyama | W | 1-3 |
| Challenger Sao Paulo | 2022/06/11 23:00 | Hiromi Yokoyama v Fabio Mizutani | L | 0-3 |
| Challenger Sao Paulo | 2022/06/11 22:40 | Alejandro Fernandez Junior v Hiromi Yokoyama | L | 3-0 |
| Challenger Sao Paulo | 2022/06/11 21:40 | Hiromi Yokoyama v De Hong Jung | L | 0-3 |
| Challenger Sao Paulo | 2022/06/11 21:00 | Leonardo Arata v Hiromi Yokoyama | L | 3-0 |
| Challenger Sao Paulo | 2022/06/02 02:20 | Alejandro Fernandez Junior v Hiromi Yokoyama | L | 3-1 |
| Challenger Sao Paulo | 2022/06/02 01:40 | Hiromi Yokoyama v Fabio Mizutani | L | 1-3 |
| Challenger Sao Paulo | 2022/06/12 00:40 | Everton Vianna v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/06/12 00:00 | Kayque Valois v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/06/11 23:20 | Roberto Tadashi Ishikawa v Alejandro Fernandez Junior | L | 0-3 |
| Challenger Sao Paulo | 2022/06/11 22:20 | Marco Cruz v Roberto Tadashi Ishikawa | W | 1-3 |
| Challenger Sao Paulo | 2022/06/11 21:40 | Leonardo Arata v Roberto Tadashi Ishikawa | L | 3-0 |
| Challenger Sao Paulo | 2022/06/11 21:00 | Fabio Mizutani v Roberto Tadashi Ishikawa | L | 3-1 |
| Challenger Sao Paulo | 2022/06/11 02:00 | Ricardo Mendes v Roberto Tadashi Ishikawa | W | 0-3 |
| Challenger Sao Paulo | 2022/06/11 01:20 | Roberto Tadashi Ishikawa v Vinicius Girotto | W | 3-0 |