Yuto Oki defeated Hikaru Shiraishi 6-4 7-6 in the M15 Karuizawa 1 quarter-final on clay. The upset overturned the form book — Hikaru Shiraishi came in ranked #488, leading the head-to-head 1–0. Yuto Oki claimed a first win over Hikaru Shiraishi in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-04-04 | M15 Kashiwa 1 | R16 | hard | Hikaru Shiraishi | 6-2 6-2 |
Averages over each player's completed matches in the selected window (2 vs 25). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About