Daisuke Sumizawa defeated Takuya Kumasaka 7-5 7-6 in the M25 Anseong 1 round of 16 on clay. The upset overturned the form book — Takuya Kumasaka came in ranked #514, leading the head-to-head 2–1. Daisuke Sumizawa narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-09-18 | M25 Takasaki 1 | R16 | hard | Takuya Kumasaka | 3-6 7-5 7-6(1) |
| 2025-03-13 | M15 Hinode 1 | R16 | hard | Takuya Kumasaka | 3-6 6-3 7-5 |
| 2023-09-19 | M25 Takasaki 1 | R32 | hard | Daisuke Sumizawa | 6-0 1-0 |
Averages over each player's completed matches in the selected window (11 vs 38). ATP, WTA & Challenger.
Kumasaka T.: 5 days rest · 3 matches, 64 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About