| Qatar Open XD | 2019/03/26 11:00 | Yuya Oshima v Hyundeok Seo | L | 4-1 |
| Qatar Open XD | 2019/03/26 07:00 | Hyundeok Seo v Leonardo Mutti | W | 4-2 |
| Qatar Open XD | 2017/11/25 12:05 | Alvaro Robles v Hyundeok Seo | L | 4-2 |
| Qatar Open XD | 2017/11/13 16:50 | Hyundeok Seo v Malte Moregard | L | 2-4 |
| Qatar Open XD | 2017/07/04 05:10 | Jun Mizutani v Hyundeok Seo | L | 4-0 |
| Qatar Open XD | 2017/07/03 06:00 | Hyundeok Seo v Shaoping Zhang | W | 4-0 |
| Qatar Open XD | 2017/07/02 10:15 | Hyundeok Seo v Chia-Hung Sun | W | 4-0 |
| Qatar Open XD | 2017/07/02 05:00 | Hyundeok Seo v Benjamin Houghton | W | 4-0 |
| Thailand Open U21 | 2019/05/23 03:00 | Jeremy Hazin v Yu-Jen Huang | W | 2-3 |