Ryotaro Matsumura defeated Jumpei Yamasaki 7-5 7-6 in the M15 Tsukuba 1 qualifying round of 16 on hard. The upset overturned the form book — Jumpei Yamasaki came in leading the head-to-head 1–0. Ryotaro Matsumura claimed a first win over Jumpei Yamasaki in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-04-16 | M15 Osaka 1 | R32 | hard | Jumpei Yamasaki | 6-1 7-5 |
Averages over each player's completed matches in the selected window (34 vs 56). ATP, WTA & Challenger.
wins 58% of points on serve vs Yamasaki J.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About