Jumpei Yamasaki and Yuto Oki have met 2 times since 2025; Jumpei Yamasaki leads 2–0. Their most recent meeting: Jumpei Yamasaki won at M15 Tsukuba (2026).
Playing styles and historical archetype record
Yamasaki
🪃 Counterpuncher
Oki
🛡️ The Spoiler
Matchup analysis
The 🪃 Counterpuncher archetype wins about 57% vs 🛡️ The Spoiler across 1,775 matches in our dataset — a stylistic lean toward Jumpei Yamasaki.
Counterpuncher players often use elite bp conversion and strong return game to pressure the the spoiler's strong court coverage.
2 career meetings, newest first
Hit rates on common betting markets · Last 90 days
| Outcome | Yamasaki | Oki | ||
|---|---|---|---|---|
| Outcome | Jumpei Yamasaki | Yuto Oki | ||
| 1 or more | 100% | 8/8 | 100% | 4/4 |
| 3 or more | 75% | 6/8 | 75% | 3/4 |
| 5 or more | 75% | 6/8 | 25% | 1/4 |
| 10 or more | 25% | 2/8 | 25% | 1/4 |
| 15 or more | 0% | 0/8 | 0% | 0/4 |
| 20 or more | 0% | 0/8 | 0% | 0/4 |
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Yamasaki | Oki |
|---|---|---|
| W-L | 1–3 | 1–2 |
| Avg odds | 2.01 | 3.85 |
| ROI % | -73.5% | +175.7% |
| Units P/L | -2.94u | +5.27u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Results vs. opponents both players faced · Last 12 months
Across 1 shared opponent, both Yamasaki and Oki posted a 0% win rate.
| Opponent | Yamasaki | Oki |
|---|---|---|
| Koki Matsuda | L 26 67 | L 76 46 67 |
Last five matches per player
Jangjun Kim
Futures 2026 ·
Jun 12
Hayden Jones
Futures 2026 ·
Jun 11
Colin Sinclair
Futures 2026 ·
Jun 10
Asahi Harazaki
Futures 2026 ·
Jun 8
Natsuki Yamamoto
Futures 2026 ·
Jun 7
Ryo Minakata
M15 Karuizawa · Round of 32
May 25
Leo Vithoontien
M15 Karuizawa · Round of 16
May 25
Takuya Kumasaka
M25 Nakhon Pathom · Round of 32
May 4
Tai Sach
Futures 2026 ·
Jun 18
Shinji Hazawa
Futures 2026 ·
Jun 16
Daisuke Sumizawa
Futures 2026 ·
Jun 15
Shion Itsusaki
Futures 2026 ·
Jun 14
Kosuke Ogura
Futures 2026 ·
Jun 9
Taisei Ichikawa
M15 Gimcheon · Round of 32
May 25
San Hui Sin
M15 Gimcheon · Round of 32
May 18
Yeonsu Jeong
M15 Andong · Round of 32
May 11
Cumulative head-to-head lead over time
Matches, sets and games won · Last 12 months · 23–26 matches
| Metric | Yamasaki | Oki |
|---|---|---|
| Matches won | 39% | 38% |
| Sets won | 41% | 41% |
| Games won | 48% | 49% |
Head-to-head record by tournament tier
| Stage | Yamasaki | Oki |
|---|---|---|
| ITF M15 | 2 | 0 |
Head-to-head record per surface
| Surface | Yamasaki | Oki |
|---|---|---|
| Hard | 2 | 0 |
