Player research cockpit

StefanKozlov

TennisJack analysis

Stefan Kozlov currently has a large TennisJack sample of 64 completed matches, with a 56.2% win rate in the loaded match history. The recent form line is 3-7 across the latest 10 completed matches.

Latest rank #292

Matches64Completed matches

Win rate56.2%Across all matches

Latest form3-7In latest 10 matches

Index statusStrong candidateProfile confidence

Performance metrics

Hold Base73.2%

Break Pressure29.6%

Latest form (10 matches)

3-7

W L L W L L L W L L

Surface profile

Hardcourt outdoor

Canonical/players/stefan-kozlov/

Index statusStrong candidate

Last updatedData from TennisJack

Profile intelligence

Ten signals worth watching.

Built from 64 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 Close-set risk Stable server

Set 1 punch56.2%

Service shield73.2%

Return bite29.6%

Decider risk50.0%

Favorite / Underdog Split

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

Favorite 71.4% 20-8 - 28 matches Avg odds 1.39 | 1+ set 85.7%

Underdog 36.4% 4-7 - 11 matches Avg odds 2.36 | 1+ set 72.7%

First Set Personality

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

Set 1 win56.2%

Breaks first S149.2%

Broken first S150.8%

Recovers S129.0%

Break Pressure Profile

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

Avg breaks3.48

Avg broken3.16

Balance0.33

Clean service matches7.8%

3+ breaks produced75.0%

Set 2 win50.0%

Clean Win / Comeback Index

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

33.3%Clean 2-0 share among wins

Clean 2-0 wins12

Comeback signals32

Lost set 1, won match5

Comeback index50.0%

Surface Edge

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

Primary surfaceHardcourt outdoor

Primary record15-15

Primary WR50.0%

Best surfaceHardcourt indoor 68.8%

Hardcourt outdoor15-1550.0%

Hardcourt indoor11-568.8%

Clay7-653.8%

Grass3-260.0%

Odds Value Pulse

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

Avg win odds1.51

Avg loss odds1.89

Biggest win odds2.63

2.00+ odds WR30.0%

2.00+ sample10

Odds sample39

Decider Profile

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

Three-set share50.0%

Decider record18-14

Set 3 win56.2%

After losing S117.9%

Close Set Risk

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

Close sets38-33

Close-set WR53.5%

Tie-breaks9-10

Matches with tight set50

Momentum Trend

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

Cooling down · 2 losses running

W L L W L L L W L L

Latest 5 WR20.0%

Previous 10 WR50.0%

Latest 51-4

Previous 105-5

Trend delta-30.0%

Latest 5 WR20.0%

Match log

All Stefan Kozlov 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
22.09.2026R32	Stefan Kozlov vs Colton SmithChallenger San Diego	4-6 2-6Hardcourt outdoor	Loss	Hold 55.6% Break 11.1%
13.08.2026R16	Stefan Kozlov vs Harry WendelkenChallenger Brownsburg	6-2 4-6 1-6Hardcourt outdoor	Loss	Hold 53.9% Break 33.3%
12.08.2026R32	Stefan Kozlov vs Aidan MayoChallenger Brownsburg	6-3 5-7 6-2Hardcourt outdoor	Win	Hold 93.3% Break 21.4%
25.07.2026Round 14	Stefan Kozlov vs Zachary SvajdaATP Washington	5-7 1-6Hardcourt outdoor	Loss	Hold 44.4% Break 20.0%
21.07.2026R32	Stefan Kozlov vs Alan MagadanChallenger Bloomfield Hills	6-3 1-6 6-7Hardcourt outdoor	Loss	Hold 64.3% Break 26.7%
20.07.2026Round 19	Stefan Kozlov vs Roger Pascual FerraChallenger Bloomfield Hills	4-6 4-6Hardcourt outdoor	Loss	Hold 70.0% Break 10.0%
19.07.2026Round 14	Stefan Kozlov vs Leo VithoontienChallenger Bloomfield Hills	4-6 6-1 6-2Hardcourt outdoor	Win	Hold 92.3% Break 33.3%
14.07.2026R32	Stefan Kozlov vs Yi ZhouChallenger Pozoblanco	3-6 6-3 4-6Hardcourt outdoor	Loss	Hold 64.3% Break 28.6%
10.07.2026R16	Stefan Kozlov vs Jacob FearnleyChallenger Newport	6-3 3-6 2-6Grass	Loss	Hold 46.1% Break 41.7%
09.07.2026R32	Stefan Kozlov vs Yibing WuChallenger Newport	6-4 2-6 6-4Grass	Win	Hold 64.3% Break 35.7%
07.07.2026Round 19	Stefan Kozlov vs Garrett JohnsChallenger Newport	6-4 6-2Grass	Win	Hold 77.8% Break 55.6%
05.07.2026Round 14	Stefan Kozlov vs Aidan MayoChallenger Newport	7-6 5-7 6-3Grass	Win	Hold 81.2% Break 22.2%
12.05.2026Round 19	Stefan Kozlov vs Alejo Sanchez QuilezChallenger Valencia	5-7 4-6Clay	Loss	Hold 63.6% Break 18.2%
11.05.2026Round 14	Stefan Kozlov vs Mario Mansilla DiezChallenger Valencia	6-2 6-1Clay	Win	Hold 87.5% Break 71.4%
22.04.2026R16	Stefan Kozlov vs Nick HardtChallenger Savannah	2-6 6-2 0-6Clay	Loss	Hold 36.4% Break 36.4%
20.04.2026R32	Stefan Kozlov vs Daniil GlinkaChallenger Savannah	6-2 6-3Clay	Win	Hold 66.7% Break 75.0%
14.04.2026R32	Stefan Kozlov vs Alex RybakovChallenger Tallahassee	6-7 2-6Clay	Loss	Hold 60.0% Break 18.2%
13.04.2026Round 19	Stefan Kozlov vs Kilian FeldbauschChallenger Tallahassee	6-1 4-6 7-6Clay	Win	Hold 73.3% Break 33.3%
12.04.2026Round 14	Stefan Kozlov vs Strong KirchheimerChallenger Tallahassee	6-0 6-4Clay	Win	Hold 87.5% Break 62.5%
08.04.2026R16	Stefan Kozlov vs James DuckworthChallenger Mexico City	3-6 2-6Clay	Loss	Hold 62.5% Break 0.0%
06.04.2026R32	Stefan Kozlov vs Raphael PerotChallenger Mexico City	6-3 6-1Clay	Win	Hold 85.7% Break 62.5%
01.04.2026R32	Stefan Kozlov vs Alan MagadanChallenger San Luis Potosi	3-6 6-7Clay	Loss	Hold 80.0% Break 8.3%
24.03.2026R32	Stefan Kozlov vs Andres MartinChallenger Morelia	2-6 2-6Hardcourt outdoor	Loss	Hold 50.0% Break 0.0%
19.03.2026R16	Stefan Kozlov vs Michael MmohChallenger Morelos	5-7 2-6Hardcourt outdoor	Loss	Hold 40.0% Break 30.0%
17.03.2026R32	Stefan Kozlov vs Alan MagadanChallenger Morelos	6-4 6-4Hardcourt outdoor	Win	Hold 80.0% Break 40.0%
11.03.2026R32	Stefan Kozlov vs Jay FriendChallenger Phoenix	2-6 6-4 3-6Hardcourt outdoor	Loss	Hold 53.9% Break 28.6%
10.03.2026Round 19	Stefan Kozlov vs Marc PolmansChallenger Phoenix	6-1 3-6 6-4Hardcourt outdoor	Win	Hold 84.6% Break 25.0%
09.03.2026Round 14	Stefan Kozlov vs Nathan PonwithChallenger Phoenix	7-5 6-4Hardcourt outdoor	Win	Hold 100.0% Break 18.2%
22.02.2026Round 14	Stefan Kozlov vs Patrick KypsonATP Acapulco	6-7 0-6Hardcourt outdoor	Loss	Hold 55.6% Break 10.0%
20.02.2026QF	Stefan Kozlov vs Rodrigo Pacheco MendezChallenger Metepec	4-6 2-6Hardcourt outdoor	Loss	Hold 66.7% Break 0.0%
18.02.2026R16	Stefan Kozlov vs Karl PolingChallenger Metepec	6-4 7-6Hardcourt outdoor	Win	Hold 72.7% Break 33.3%
16.02.2026R32	Stefan Kozlov vs Tristan McCormickChallenger Metepec	6-3 6-7 6-4Hardcourt outdoor	Win	Hold 87.5% Break 25.0%
06.02.2026QF	Stefan Kozlov vs Keegan SmithChallenger Cleveland	3-6 2-6Hardcourt indoor	Loss	Hold 62.5% Break 0.0%
04.02.2026R16	Stefan Kozlov vs Raphael PerotChallenger Cleveland	7-6 3-6 6-3Hardcourt indoor	Win	Hold 71.4% Break 25.0%
03.02.2026R32	Stefan Kozlov vs Cedrik-Marcel StebeChallenger Cleveland	3-6 6-2 6-3Hardcourt indoor	Win	Hold 92.3% Break 23.1%
28.01.2026R32	Stefan Kozlov vs Sho ShimabukuroChallenger San Diego	2-6 6-4 6-7Hardcourt outdoor	Loss	Hold 53.3% Break 37.5%
22.01.2026R16	Stefan Kozlov vs Francesco PassaroChallenger Oeiras	3-6 6-1 1-6Hardcourt indoor	Loss	Hold 63.6% Break 25.0%
20.01.2026R32	Stefan Kozlov vs Alexis GalarneauChallenger Oeiras	7-6 2-6 6-1Hardcourt indoor	Win	Hold 78.6% Break 21.4%
19.01.2026Round 19	Stefan Kozlov vs Mikhail KukushkinChallenger Oeiras	6-4 6-2Hardcourt indoor	Win	Hold 88.9% Break 44.4%
13.01.2026R32	Stefan Kozlov vs Harry WendelkenChallenger Glasgow	1-6 6-3 4-6Hardcourt indoor	Loss	Hold 61.5% Break 23.1%
08.01.2026QF	Stefan Kozlov vs Toby SamuelChallenger Nottingham	6-7 4-6Hardcourt indoor	Loss	Hold 81.8% Break 8.3%
07.01.2026R16	Stefan Kozlov vs Mathys ErhardChallenger Nottingham	6-2 6-4Hardcourt indoor	Win	Hold 100.0% Break 33.3%
06.01.2026R32	Stefan Kozlov vs Tyler ZinkChallenger Nottingham	6-4 6-1Hardcourt indoor	Win	Hold 100.0% Break 44.4%
28.11.2025QF	Stefan Kozlov vs Juan Sebastian GomezChallenger Bogota	6-4 4-6 5-7Clay	Loss	Hold 64.3% Break 26.7%
27.11.2025R16	Stefan Kozlov vs David Jorda SanchisChallenger Bogota	6-4 6-4Clay	Win	Hold 90.0% Break 30.0%
25.11.2025R32	Stefan Kozlov vs Juan Bautista TorresChallenger Bogota	6-0 4-6 6-3Clay	Win	Hold 83.3% Break 46.1%
16.11.2025Final	Stefan Kozlov vs Murphy CassoneChallenger Champaign	7-6 7-5Hardcourt indoor	Win	Hold 75.0% Break 30.8%
15.11.2025QF	Stefan Kozlov vs Darwin BlanchChallenger Champaign	6-2 6-7 6-3Hardcourt indoor	Win	Hold 92.9% Break 26.7%
13.11.2025R16	Stefan Kozlov vs Tyler ZinkChallenger Champaign	6-3 6-3Hardcourt indoor	Win	Hold 88.9% Break 44.4%
11.11.2025R32	Stefan Kozlov vs Leo BorgChallenger Champaign	6-1 6-0Hardcourt indoor	Win	Hold 100.0% Break 83.3%
05.11.2025R16	Stefan Kozlov vs Jay ClarkeChallenger Knoxville	2-6 6-2 3-6Hardcourt indoor	Loss	Hold 75.0% Break 15.4%
04.11.2025R32	Stefan Kozlov vs Dominique RollandChallenger Knoxville	7-6 2-6 6-1Hardcourt indoor	Win	Hold 64.3% Break 35.7%
04.08.2025Round 19	Stefan Kozlov vs Tsung-Hao HuangChallenger Chicago	6-1 5-7 2-6Hardcourt outdoor	Loss	Hold 76.9% Break 21.4%
07.07.2025R32	Stefan Kozlov vs Mitchell KruegerChallenger Newport	1-6 6-3 1-6Grass	Loss	Hold 63.6% Break 8.3%
02.06.2025Round 19	Stefan Kozlov vs Alvin N TudoricaChallenger Tyler	5-7 3-6Hardcourt outdoor	Loss	Hold 50.0% Break 27.3%
02.06.2025Round 14	Stefan Kozlov vs Daniel MilavskyChallenger Tyler	6-3 6-7 6-3Hardcourt outdoor	Win	Hold 87.5% Break 26.7%
29.05.2025R16	Stefan Kozlov vs Andres AndradeChallenger Little Rock	1-6 6-4 5-7Hardcourt outdoor	Loss	Hold 40.0% Break 42.9%
28.05.2025R32	Stefan Kozlov vs Mohamed Aziz DougazChallenger Little Rock	5-7 6-3 6-2Hardcourt outdoor	Win	Hold 71.4% Break 46.7%
28.05.2025Round 19	Stefan Kozlov vs Elmar EjupovicChallenger Little Rock	6-4 7-6Hardcourt outdoor	Win	Hold 100.0% Break 8.3%
28.05.2025Round 14	Stefan Kozlov vs Kiranpal PannuChallenger Little Rock	7-6 2-6 6-2Hardcourt outdoor	Win	Hold 64.3% Break 33.3%
18.05.2025	Stefan Kozlov vs Santiago Rodriguez TavernaITF M25 Xalapa	6-7 6-4 6-4Hardcourt outdoor	Win	Hold 93.8% Break 17.6%
18.05.2025	Stefan Kozlov vs Maxwell McKennonITF M25 Xalapa	2-6 6-1 6-4Hardcourt outdoor	Win	Hold 76.9% Break 33.3%
17.05.2025	Stefan Kozlov vs Aidan MayoM25 Xalapa	6-4 6-4Hardcourt outdoor	Win	Hold 90.0% Break 30.0%
15.05.2025	Stefan Kozlov vs Axel NefveITF M25 Xalapa	6-4 6-4Hardcourt outdoor	Win	Hold 80.0% Break 40.0%