Sota Tani defeated Yudai Umeoka 7-6 6-2 in the M15 Karuizawa 1 q32 on clay. The upset overturned the form book — Yudai Umeoka came in leading the head-to-head 1–0. Sota Tani claimed a first win over Yudai Umeoka in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-03-10 | M15 Hinode 1 | Q64 | hard | Yudai Umeoka | 4-6 6-2 10-4 |