N. Koizumi defeated Yuta Kawahashi 7-5 6-3 in the M15 Tokyo 1 round of 32 on hard. N. Koizumi extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-07-07 | M15 Wuning 5 | R32 | hard | N. Koizumi | 6-5 |
| 2025-06-05 | M15 Karuizawa 1 | R16 | clay | Yuta Kawahashi | 6-3 6-0 |
Averages over each player's completed matches in the selected window (4 vs 47). ATP, WTA & Challenger.
Koizumi N.: 3 days rest · 1 match, 17 games (7d) · Kawahashi Y.: 2 days rest · 2 matches, 35 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