Ryotaro Matsumura defeated Shinji Hazawa 6-2 5-7 6-3 in the M15 Tanagura 1 round of 16 on hard. The upset overturned the form book — Shinji Hazawa came in leading the head-to-head 1–0, but Ryotaro Matsumura had been the form player, winning 3 of their last 8 on hard. Ryotaro Matsumura claimed a first win over Shinji Hazawa in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-06-05 | M15 Harmon 1 | R32 | hard | Shinji Hazawa | 5-0 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.