Player research cockpit

JumpeiYamasaki

TennisJack analysis

Jumpei Yamasaki currently has a useful TennisJack sample of 45 completed matches, with a 57.8% win rate in the loaded match history. The recent form line is 6-4 across the latest 10 completed matches.

Latest rank #973

Matches45Completed matches

Win rate57.8%Across all matches

Latest form6-4In latest 10 matches

Index statusReview candidateProfile confidence

Performance metrics

Hold Base75.0%

Break Pressure37.1%

Latest form (10 matches)

6-4

L W W L W L W W W L

Surface profile

Hardcourt outdoor

Canonical/players/jumpei-yamasaki/

Index statusReview candidate

Last updatedData from TennisJack

Profile intelligence

Ten signals worth watching.

Built from 45 completed TennisJack matches: form, surface, odds, pressure and close-set behavior. The full match log stays below for audit.

Player DNA

Quick fingerprint from starts, service base, return bite and decider exposure.

Balanced starts Break-heavy player Stable server

Set 1 punch57.8%

Service shield75.0%

Return bite37.1%

Decider risk17.8%

Favorite / Underdog Split

How the player behaves when priced as market favorite versus outsider.

Favorite 76.9% 10-3 - 13 matches Avg odds 1.39 | 1+ set 76.9%

Underdog 20.0% 2-8 - 10 matches Avg odds 2.34 | 1+ set 50.0%

First Set Personality

Shows whether the player starts cleanly, breaks first, or survives early pressure.

Set 1 win57.8%

Breaks first S153.5%

Broken first S146.5%

Recovers S115.0%

Break Pressure Profile

Return damage versus service leakage, built from set-level break counters.

Avg breaks3.16

Avg broken2.42

Balance0.73

Clean service matches22.2%

3+ breaks produced62.2%

Set 2 win62.2%

Clean Win / Comeback Index

Separates smooth 2-0 wins from matches where the player had to repair damage.

69.2%Clean 2-0 share among wins

Clean 2-0 wins18

Comeback signals26

Lost set 1, won match2

Comeback index57.8%

Surface Edge

Where the profile is most trustworthy and where the win rate really travels.

Primary surfaceHardcourt outdoor

Primary record12-8

Primary WR60.0%

Best surfaceClay 66.7%

Hardcourt outdoor12-860.0%

Unknown10-855.6%

Hardcourt indoor2-250.0%

Clay2-166.7%

Odds Value Pulse

Shows whether the player wins as expected or creates value at outsider prices.

Avg win odds1.42

Avg loss odds2.22

Biggest win odds2.20

2.00+ odds WR14.3%

2.00+ sample7

Odds sample23

Decider Profile

How often matches become complicated, and whether the player survives the third set.

Three-set share17.8%

Decider record3-5

Set 3 win37.5%

After losing S110.5%

Close Set Risk

Tie-break and 7-5 / 7-6 pressure profile, useful for spotting fragile edges.

Close sets18-17

Close-set WR51.4%

Tie-breaks7-6

Matches with tight set24

Momentum Trend

Compares the latest 5 matches with the previous 10 so form shifts are visible immediately.

Stable form · 1 losses running

L W W L W L W W W L

Latest 5 WR60.0%

Previous 10 WR60.0%

Latest 53-2

Previous 106-4

Trend delta+0.0%

Latest 5 WR60.0%

Match log

All Jumpei Yamasaki matches in the TennisJack sample.

Scan date, tournament, surface, opponent, set score, result and service-return indicators before opening the deeper tools.

Open Player Research

Date	Match	Score	Result	Hold / Break
12.06.2026	Jumpei Yamasaki vs Jangjun KimM15 Tokyo	1-6 4-6Surface pending	Loss	Hold 62.5% Break 0.0%
11.06.2026	Jumpei Yamasaki vs Hayden JonesM15 Tokyo	6-1 7-6Surface pending	Win	Hold 90.0% Break 30.0%
10.06.2026	Jumpei Yamasaki vs Colin SinclairM15 Tokyo	7-6 6-3Surface pending	Win	Hold 100.0% Break 9.1%
08.06.2026	Jumpei Yamasaki vs Asahi HarazakiM15 Tokyo	6-4 6-2Surface pending	Win	Hold 88.9% Break 44.4%
28.05.2026	Jumpei Yamasaki vs Leo VithoontienM15 Karuizawa	4-6 4-6Surface pending	Loss	Hold 70.0% Break 10.0%
26.05.2026	Jumpei Yamasaki vs Ryo MinakataM15 Karuizawa	6-1 6-3Surface pending	Win	Hold 100.0% Break 50.0%
06.05.2026	Jumpei Yamasaki vs Takuya KumasakaM25 Nakhon Pathom	2-6 2-6Surface pending	Loss	Hold 37.5% Break 12.5%
04.05.2026	Jumpei Yamasaki vs Abhinav Sanjeev ShanmugamM25 Nakhon Pathom	6-4 6-4Surface pending	Win	Hold 80.0% Break 40.0%
03.05.2026	Jumpei Yamasaki vs Krittin KoaykulM25 Nakhon Pathom Qual	6-0 6-1Surface pending	Win	Hold 100.0% Break 85.7%
30.04.2026	Jumpei Yamasaki vs Masamichi ImamuraM25 Nakhon Pathom	0-6 4-6Hardcourt outdoor	Loss	Hold 37.5% Break 12.5%
28.04.2026	Jumpei Yamasaki vs Manish SureshkumarM25 Nakhon Pathom	6-4 3-6 7-6Surface pending	Win	Hold 86.7% Break 11.8%
26.04.2026	Jumpei Yamasaki vs Veerawit KamputM25 Nakhon Pathom	6-0 6-0Surface pending	Win	Hold 100.0% Break 100.0%
22.04.2026	Jumpei Yamasaki vs Anton SheppM15 Singapore	4-6 4-6Surface pending	Loss	Hold 80.0% Break 0.0%
02.04.2026	Jumpei Yamasaki vs Hikaru ShiraishiM15 Kashiwa	3-6 7-6 5-7Surface pending	Loss	Hold 87.5% Break 0.0%
01.04.2026	Jumpei Yamasaki vs Kosuke ShibanoM15 Kashiwa	3-6 6-1 6-1Surface pending	Win	Hold 83.3% Break 45.5%
27.03.2026	Jumpei Yamasaki vs Yuta TomidaM15 Tsukuba	3-6 2-6Surface pending	Loss	Hold 37.5% Break 22.2%
24.03.2026	Jumpei Yamasaki vs Yuto OkiM15 Tsukuba	6-1 6-1Hardcourt outdoor	Win	Hold 85.7% Break 85.7%
18.03.2026	Jumpei Yamasaki vs Leo VithoontienM15 Nishi-Tokyo	6-2 6-7 4-6Surface pending	Loss	Hold 80.0% Break 25.0%
17.03.2026	Jumpei Yamasaki vs Liam KrallM15 Nishi-Tokyo	6-4 6-2Surface pending	Win	Hold 77.8% Break 55.6%
11.03.2026	Jumpei Yamasaki vs Koki MatsudaM15 Hinode	2-6 6-7Surface pending	Loss	Hold 50.0% Break 27.3%
22.02.2026Final	Jumpei Yamasaki vs Naoki NakagawaUTR Pro Kawaguchi	6-1 6-4Hardcourt outdoor	Win	Hold 88.9% Break 50.0%
21.02.2026SF	Jumpei Yamasaki vs Ryota TanumaUTR Pro Kawaguchi	7-6 6-0Hardcourt outdoor	Win	Hold 77.8% Break 50.0%
20.02.2026	Jumpei Yamasaki vs Ren MachidaUTR Pro Kawaguchi	6-2 6-0Hardcourt outdoor	Win	Hold 85.7% Break 85.7%
19.02.2026	Jumpei Yamasaki vs Yuga TashiroUTR Pro Kawaguchi	6-2 6-1Hardcourt outdoor	Win	Hold 100.0% Break 57.1%
18.02.2026	Jumpei Yamasaki vs Naoto TomizawaUTR Pro Kawaguchi	6-2 6-1Hardcourt outdoor	Win	Hold 87.5% Break 71.4%
17.02.2026	Jumpei Yamasaki vs Ryunosuke KabasawaUTR Pro Kawaguchi	6-3 6-1Hardcourt outdoor	Win	Hold 75.0% Break 75.0%
05.01.2026Round 19	Jumpei Yamasaki vs Felix BalshawChallenger Bengaluru	2-6 6-3 2-6Hardcourt outdoor	Loss	Hold 53.9% Break 25.0%
04.01.2026Round 14	Jumpei Yamasaki vs Masamichi ImamuraChallenger Bengaluru	6-7 6-4 6-2Hardcourt outdoor	Win	Hold - Break -
18.11.2025R32	Jumpei Yamasaki vs Yuki MochizukiChallenger Yokohama	4-6 6-7Hardcourt outdoor	Loss	Hold 63.6% Break 25.0%
17.11.2025Round 19	Jumpei Yamasaki vs Naoki NakagawaChallenger Yokohama	6-3 6-1Hardcourt outdoor	Win	Hold 100.0% Break 50.0%
19.09.2025	Jumpei Yamasaki vs Takuya KumasakaITF M25 Takasaki	7-6 0-6 3-6Hardcourt outdoor	Loss	Hold 35.7% Break 28.6%
18.09.2025	Jumpei Yamasaki vs Taiyo YamanakaITF M25 Takasaki	6-2 6-3Hardcourt outdoor	Win	Hold 100.0% Break 44.4%
15.09.2025	Jumpei Yamasaki vs Jonathan MridhaITF M25 Takasaki	7-5 7-6Hardcourt outdoor	Win	Hold 83.3% Break 23.1%
02.09.2025	Jumpei Yamasaki vs Shunsuke NakagawaITF M25 Sapporo	3-6 6-7Hardcourt outdoor	Loss	Hold 90.0% Break 0.0%
14.08.2025	Jumpei Yamasaki vs Koki MatsudaITF M15 Singapore	2-6 4-6Hardcourt indoor	Loss	Hold 55.6% Break 11.1%
13.08.2025	Jumpei Yamasaki vs Abhinav Sanjeev ShanmugamITF M15 Singapore	6-3 6-3Hardcourt indoor	Win	Hold 88.9% Break 44.4%
07.08.2025	Jumpei Yamasaki vs Shu MatsuokaM15 Singapore	2-6 2-6Hardcourt indoor	Loss	Hold 25.0% Break 25.0%
05.08.2025	Jumpei Yamasaki vs Yuto OkiM15 Singapore	6-4 6-4Hardcourt indoor	Win	Hold 100.0% Break 20.0%
11.06.2025	Jumpei Yamasaki vs Colin SinclairITF M15 Harmon	3-6 7-5 3-6Hardcourt outdoor	Loss	Hold 60.0% Break 26.7%
06.06.2025	Jumpei Yamasaki vs Sora FukudaITF M15 Karuizawa	1-6 3-6Clay	Loss	Hold 25.0% Break 25.0%
05.06.2025	Jumpei Yamasaki vs Junhyun LeeITF M15 Karuizawa	6-2 6-3Clay	Win	Hold 88.9% Break 50.0%
04.06.2025	Jumpei Yamasaki vs Yamato YukawaITF M15 Karuizawa	6-0 6-1Clay	Win	Hold 100.0% Break 85.7%
23.05.2025	Jumpei Yamasaki vs Taiyo YamanakaITF M15 Luan	1-6 1-6Hardcourt outdoor	Loss	Hold 28.6% Break 0.0%
15.05.2025	Jumpei Yamasaki vs Woobin ShinITF M15 Luan	6-7 5-7Hardcourt outdoor	Loss	Hold 75.0% Break 15.4%
13.05.2025	Jumpei Yamasaki vs Xing Dao ChenITF M15 Luan	6-3 6-1Hardcourt outdoor	Win	Hold 75.0% Break 75.0%