| Indonesia Masters MD | 2021/11/17 09:30 | Ivanov V / Sozonov I v Kusumawa. / Rambitan | W | 0-2 |
| Hylo Open MD | 2021/11/06 12:50 | Kusumawa. / Rambitan v Carnando/Marthin | L | 0-2 |
| Hylo Open MD | 2021/11/05 11:10 | Kusumawa. / Rambitan v Alfian/Ardianto | W | 2-0 |
| Hylo Open MD | 2021/11/04 12:25 | Kusumawa. / Rambitan v Lu/Yang | W | 2-1 |
| Hylo Open MD | 2021/11/03 08:05 | Lee/Yang v Kusumawa. / Rambitan | W | 1-2 |
| Belgian Int. MD | 2021/10/30 14:30 | Fikri/Maulana v Kusumawa. / Rambitan | W | 0-2 |
| Belgian Int. MD | 2021/10/29 17:50 | Boe/Kjaer v Kusumawa. / Rambitan | W | 0-2 |
| Belgian Int. MD | 2021/10/29 09:00 | Inoue/Mitsuhashi v Kusumawa. / Rambitan | W | 0-2 |
| Open de France - Doubles Hommes | 2021/10/28 12:10 | Ko S H / Shin B C v Koga/Saito | L | 2-0 |
| Denmark Open MD | 2021/10/22 14:00 | Koga/Saito v Hoki/Kobayashi | L | 0-2 |
| Denmark Open MD | 2021/10/21 14:20 | Koga/Saito v Chia/Soh | W | 2-0 |
| Denmark Open MD | 2021/10/20 10:20 | Matsui/Takeuchi v Koga/Saito | W | 1-2 |
| Thomas Cup - Hommes Doubles | 2021/10/16 12:30 | Liu/Wang v Koga/Saito | L | 2-0 |
| Sudirman Cup MD | 2021/10/01 13:00 | Lee/Yang v Koga/Saito | L | 2-0 |
| Sudirman Cup MD | 2021/09/28 14:00 | Koga/Saito v Lane/Vendy | W | 2-1 |
| Open d'Angleterre - Double Mixtes | 2021/03/18 10:40 | Kamura T / Sonoda K v Koga/Saito | L | 2-0 |