Ryota Tanuma defeated N. Koizumi 6-3 7-6 in the M15 Tokyo 2 q16 on hard. Ryota Tanuma extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-08-17 | M25 Taipei | Q16 | hard | N. Koizumi | 6-1 6-3 |
| 2025-07-03 | M15 Tokyo 1 | R16 | hard | Ryota Tanuma | 6-4 6-1 |
| 2024-09-16 | M25 Takasaki 1 | Q16 | hard | Ryota Tanuma | 6-2 6-7(6) 10-4 |
Averages over each player's completed matches in the selected window (20 vs 4). 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