Player research cockpit

Ji SungNam

TennisJack analysis

Ji Sung Nam currently has a useful TennisJack sample of 37 completed matches, with a 54.1% win rate in the loaded match history. The recent form line is 4-6 across the latest 10 completed matches.

Latest rank #125

Matches37Completed matches

Win rate54.1%Across all matches

Latest form4-6In latest 10 matches

Index statusReview candidateProfile confidence

Performance metrics

Hold Base74.2%

Break Pressure33.5%

Latest form (10 matches)

4-6

L L L L L W W W W L

Surface profile

Hardcourt outdoor

Canonical/players/ji-sung-nam/

Index statusReview candidate

Last updatedData from TennisJack

Profile intelligence

Ten signals worth watching.

Built from 37 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.

Strong starter Break-heavy player Stable server

Set 1 punch64.9%

Service shield74.2%

Return bite33.5%

Decider risk29.7%

Favorite / Underdog Split

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

Favorite 76.9% 10-3 - 13 matches Avg odds 1.33 | 1+ set 100.0%

Underdog 42.1% 8-11 - 19 matches Avg odds 3.09 | 1+ set 57.9%

First Set Personality

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

Set 1 win64.9%

Breaks first S155.9%

Broken first S144.1%

Recovers S126.7%

Break Pressure Profile

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

Avg breaks3.43

Avg broken2.70

Balance0.73

Clean service matches16.2%

3+ breaks produced67.6%

Set 2 win45.9%

Clean Win / Comeback Index

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

55.0%Clean 2-0 share among wins

Clean 2-0 wins11

Comeback signals19

Lost set 1, won match1

Comeback index51.4%

Surface Edge

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

Primary surfaceHardcourt outdoor

Primary record15-11

Primary WR57.7%

Best surfaceHardcourt indoor 62.5%

Hardcourt outdoor15-1157.7%

Hardcourt indoor5-362.5%

Clay0-30.0%

Odds Value Pulse

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

Avg win odds2.13

Avg loss odds2.69

Biggest win odds10.00

2.00+ odds WR40.0%

2.00+ sample15

Odds sample32

Decider Profile

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

Three-set share29.7%

Decider record5-6

Set 3 win45.5%

After losing S17.7%

Close Set Risk

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

Close sets14-24

Close-set WR36.8%

Tie-breaks6-4

Matches with tight set26

Momentum Trend

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

Heating up · 1 losses running

L L L L L W W W W L

Latest 5 WR80.0%

Previous 10 WR20.0%

Latest 54-1

Previous 102-8

Trend delta+60.0%

Latest 5 WR80.0%

Match log

All Ji Sung Nam 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
11.09.2026QF	Ji Sung Nam vs Luca CastelnuovoChallenger Shanghai	4-6 4-6Hardcourt outdoor	Loss	Hold 70.0% Break 10.0%
10.09.2026R16	Ji Sung Nam vs Denis YevseyevChallenger Shanghai	6-2 6-2Hardcourt outdoor	Win	Hold 100.0% Break 50.0%
08.09.2026R32	Ji Sung Nam vs Rei SakamotoChallenger Shanghai	7-6 6-4Hardcourt outdoor	Win	Hold 81.8% Break 25.0%
07.09.2026Round 19	Ji Sung Nam vs Kaito UesugiChallenger Shanghai	6-2 7-5Hardcourt outdoor	Win	Hold 80.0% Break 50.0%
06.09.2026Round 14	Ji Sung Nam vs Joshua CharltonChallenger Shanghai	7-6 6-2Hardcourt outdoor	Win	Hold 100.0% Break 18.2%
30.08.2026Round 14	Ji Sung Nam vs Dominik PalanChallenger Zhangjiagang	4-6 3-6Hardcourt outdoor	Loss	Hold 60.0% Break 11.1%
31.05.2026Round 14	Ji Sung Nam vs Jan KumstatChallenger Prostejov	4-6 4-6Clay	Loss	Hold 70.0% Break 11.1%
24.05.2026Round 14	Ji Sung Nam vs Laurent LokoliChallenger Vicenza	5-7 4-6Clay	Loss	Hold 72.7% Break 9.1%
12.04.2026Round 14	Ji Sung Nam vs Marat SharipovChallenger Busan	3-6 2-6Hardcourt outdoor	Loss	Hold 50.0% Break 11.1%
31.03.2026R32	Ji Sung Nam vs Braden ShickChallenger Miyazaki	4-6 2-6Hardcourt outdoor	Loss	Hold 44.4% Break 22.2%
30.03.2026Round 19	Ji Sung Nam vs Yuta KikuchiChallenger Miyazaki	6-4 6-4Hardcourt outdoor	Win	Hold 90.0% Break 30.0%
29.03.2026Round 14	Ji Sung Nam vs Takuya KumasakaChallenger Miyazaki	6-2 6-4Hardcourt outdoor	Win	Hold 77.8% Break 55.6%
25.01.2026Round 14	Ji Sung Nam vs Marek GengelChallenger Phan Thiet Qual	3-6 4-6Hardcourt outdoor	Loss	Hold 66.7% Break 10.0%
04.01.2026Round 14	Ji Sung Nam vs Kokoro IsomuraChallenger Nonthaburi	6-1 6-7 4-6Hardcourt outdoor	Loss	Hold 78.6% Break 31.2%
17.11.2025Round 19	Ji Sung Nam vs Igor MarcondesChallenger Yokohama	4-6 4-6Hardcourt outdoor	Loss	Hold 50.0% Break 30.0%
16.11.2025Round 14	Ji Sung Nam vs Nathan TrouveChallenger Yokohama	6-0 6-1Hardcourt outdoor	Win	Hold 100.0% Break 85.7%
11.11.2025R32	Ji Sung Nam vs Hynek BartonChallenger Kobe	7-6 4-6 6-7Hardcourt indoor	Loss	Hold 76.5% Break 15.8%
10.11.2025Round 19	Ji Sung Nam vs Duje AjdukovicChallenger Kobe	6-4 5-7 6-4Hardcourt indoor	Win	Hold 81.2% Break 25.0%
09.11.2025Round 14	Ji Sung Nam vs Tsung-Hao HuangChallenger Kobe	6-2 6-3Hardcourt indoor	Win	Hold 100.0% Break 44.4%
04.11.2025R32	Ji Sung Nam vs Jurij RodionovChallenger Taipei	6-2 6-7 2-6Hardcourt indoor	Loss	Hold 71.4% Break 26.7%
03.11.2025Round 19	Ji Sung Nam vs Takeru YuzukiChallenger Taipei	7-6 6-1Hardcourt indoor	Win	Hold 100.0% Break 20.0%
02.11.2025Round 14	Ji Sung Nam vs Ren NakamuraChallenger Taipei	6-1 6-2Hardcourt indoor	Win	Hold 100.0% Break 57.1%
27.10.2025Round 19	Ji Sung Nam vs Uisung ParkChallenger Seoul	4-6 1-6Hardcourt outdoor	Loss	Hold 25.0% Break 33.3%
26.10.2025Round 14	Ji Sung Nam vs Neil OberleitnerChallenger Seoul	6-3 4-6 6-1Hardcourt outdoor	Win	Hold 76.9% Break 46.1%
25.08.2025Round 19	Ji Sung Nam vs Tsung-Hao HuangChallenger Zhangjiagang	2-6 4-6Hardcourt outdoor	Loss	Hold 44.4% Break 22.2%
21.08.2025	Ji Sung Nam vs Seong Woo ChoM15 Maanshan	6-7 6-3 3-6Hardcourt indoor	Loss	Hold 80.0% Break 18.8%
20.08.2025	Ji Sung Nam vs Jaesung ChoeM15 Maanshan	7-6 6-1Hardcourt indoor	Win	Hold 90.0% Break 30.0%
03.08.2025Round 14	Ji Sung Nam vs Rafael JodarChallenger Grodzisk Mazowiecki	0-6 3-6Hardcourt outdoor	Loss	Hold 42.9% Break 0.0%
20.07.2025Round 14	Ji Sung Nam vs Lukas PokornyChallenger Zug	6-4 2-6 1-6Clay	Loss	Hold 53.9% Break 16.7%
05.06.2025	Ji Sung Nam vs Evan ZhuITF M25 Changwon	6-2 4-6 4-6Hardcourt outdoor	Loss	Hold 57.1% Break 42.9%
04.06.2025	Ji Sung Nam vs Chase FergusonITF M25 Changwon	7-6 5-4Hardcourt outdoor	Win	Hold 81.8% Break 25.0%
01.06.2025	Ji Sung Nam vs Uisung ParkITF M15 Daegu	6-1 6-2Hardcourt outdoor	Win	Hold 85.7% Break 75.0%
31.05.2025	Ji Sung Nam vs Jeamoon LeeITF M15 Daegu	1-6 6-2 6-3Hardcourt outdoor	Win	Hold 58.3% Break 50.0%
30.05.2025	Ji Sung Nam vs Thanapet ChantaITF M15 Daegu	6-2 6-2Hardcourt outdoor	Win	Hold 87.5% Break 62.5%
29.05.2025	Ji Sung Nam vs Jay FriendITF M15 Daegu	6-3 6-1Hardcourt outdoor	Win	Hold 75.0% Break 75.0%
23.05.2025	Ji Sung Nam vs Seung Woo ChoM15 Andong	6-3 2-6 6-1Hardcourt outdoor	Win	Hold 83.3% Break 33.3%
22.05.2025	Ji Sung Nam vs Hoyoung RohM15 Andong	6-1 4-6 6-0Hardcourt outdoor	Win	Hold 81.8% Break 58.3%