Daisuke Sumizawa defeated Koki Matsuda 6-3 3-6 6-3 in the M15 Kashiwa 1 round of 32 on hard. The upset overturned the form book — Koki Matsuda came in ranked #516, leading the head-to-head 4–0. Daisuke Sumizawa claimed a first win over Koki Matsuda in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-04-24 | M15 Osaka 2 | R16 | hard | Koki Matsuda | 3-6 6-4 7-6(5) |
| 2025-02-26 | M15 Maanshan 1 | R32 | hard | Koki Matsuda | 6-2 6-4 |
| 2023-12-20 | M15 Yanagawa 1 | R32 | hard | Koki Matsuda | 7-5 6-3 |
| 2023-09-15 | M25 Sapporo 2 | R16 | hard | Koki Matsuda | 6-0 7-6(3) |
Averages over each player's completed matches in the selected window (5 vs 17). ATP, WTA & Challenger.
Matsuda K.: 7 days rest · 1 match, 32 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