Ryusuke Horiuchi defeated Kazuki Nishiwaki 1-6 6-3 10-4 in the M15 Kashiwa 1 q32 on hard. The result followed the form book — Ryusuke Horiuchi came in leading the head-to-head 1–0. Ryusuke Horiuchi extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-08 | M15 Luan 8 | Q64 | hard | Ryusuke Horiuchi | 7-5 |