Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF M15 Anseong | 2022/08/15 07:15 | Hayeon Seong v Dogeon Park | 6-3,6-1 |
| ITF M15 Anseong | 2022/08/15 03:20 | Geni Inoue v Hayeon Seong | 3-6,5-7 |
| ITF M15 Changwon | 2019/10/15 01:00 | Takuya Kumasaka v Hayeon Seong | 4-6,6-2,10-1 |
| ITF M15 Anseong | 2019/06/26 04:00 | Hayeon Seong v Haru Inoue | 2-6,2-6 |
| ITF M15 Anseong | 2019/06/25 01:00 | Hayeon Seong v Sam Ryan Ziegann | 7-5,6-1 |
| ITF M15 Anseong | 2019/06/24 02:00 | David Barclay v Hayeon Seong | 7-5,6-7,8-10 |
| ITF M15 Monastir | 2021/08/31 08:00 | Yuta Kawahashi v Alex Knaff | 7-5,4-6,7-10 |
| ITF M15 Monastir | 2021/08/30 11:00 | Yuta Kawahashi v Alessandro Coccioli | 6-0,6-2 |
| ITF M15 Monastir | 2021/08/29 10:30 | Yuta Kawahashi v Imran D Abd Hazli | 6-1,6-3 |
| ITF M15 Monastir | 2021/08/26 07:30 | Yuta Kawahashi v Ezekiel Clark | 3-6,1-6 |
| ITF M15 Monastir | 2021/08/25 08:55 | Naoki Tajima v Yuta Kawahashi | 3-6,4-6 |
| ITF M15 Monastir | 2021/08/24 07:30 | Yuta Kawahashi v Fabrizio Andaloro | 6-4,6-1 |
| ITF M15 Monastir | 2021/08/22 08:30 | Yuta Kawahashi v Credit Chaiyarin | 6-2,6-3 |
| ITF M15 Monastir | 2021/08/18 07:30 | Yuta Kawahashi v Kyle Seelig | 6-1,4-6,6-7 |