
Jumpei Yamasaki defeated Renta Tokuda 6-3 1-6 6-3 in the Japan F3 round of 32 on hard. The upset overturned the form book — Renta Tokuda came in ranked #456, leading the head-to-head 5–1, but Jumpei Yamasaki had been the form player, winning 6 of their last 10 on hard. Jumpei Yamasaki narrowed the head-to-head to 5–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-04-18 | M15 Osaka 1 | QF | hard | Renta Tokuda | 6-1 6-4 |
| 2024-12-16 | M15 Bali 3 | Q16 | hard | Renta Tokuda | 6-3 3-6 10-5 |
| 2018-04-09 | Japan F6 | QF | hard | Renta Tokuda | 4-6 6-2 6-4 |
| 2016-09-05 | Thailand F3 | SF | hard | Renta Tokuda | 7-5 6-1 |
| 2016-08-29 | Thailand F2 | R16 | hard | Renta Tokuda | 4-6 6-2 6-0 |
| 2016-08-01 | Vietnam F2 | R16 | hard | Jumpei Yamasaki | 6-1 6-3 |
Averages over each player's completed matches in the selected window (200 vs 200). 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