J.J. Wolf and Stefan Kozlov have met 9 times since 2019; J.J. Wolf leads 5–4. Their most recent meeting: J.J. Wolf won at Cleveland (2025).
Playing styles and historical archetype record
Wolf
👑 The Complete Package
Kozlov
⚔️ The Gladiator
Matchup analysis
The 👑 The Complete Package archetype wins about 56% vs ⚔️ The Gladiator across 735 matches in our dataset — a stylistic lean toward J.J. Wolf.
The Complete Package players often use elite serve & return and high bp conversion to pressure the the gladiator's physical intensity.
9 career meetings, newest first
Jan 31, 2025
Cleveland
H Hard · Quarterfinals
Jul 5, 2024
Bloomfield Hills
H Hard · Quarterfinals
Sep 19, 2022
San Diego
H Hard · Round of 32
Nov 18, 2021
Champaign
H Hard · Semifinals
Nov 6, 2021
Charlottesville
H Hard · Semifinals
Oct 31, 2021
Las Vegas
H Hard · Finals
Sep 25, 2021
Columbus
H Hard · Semifinals
Nov 12, 2019
Champaign
H Hard · Quarterfinals
Jan 8, 2019
Columbus
H Hard · Round of 64
Hit rates on common betting markets · Last 90 days
| Outcome | Wolf | Kozlov | ||
|---|---|---|---|---|
| Outcome | J.J. Wolf | Stefan Kozlov | ||
| 1 or more | 100% | 3/3 | 60% | 6/10 |
| 3 or more | 100% | 3/3 | 20% | 2/10 |
| 5 or more | 33% | 1/3 | 10% | 1/10 |
| 10 or more | 0% | 0/3 | 0% | 0/10 |
| 15 or more | 0% | 0/3 | 0% | 0/10 |
| 20 or more | 0% | 0/3 | 0% | 0/10 |
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Wolf | Kozlov |
|---|---|---|
| W-L | 2–2 | 5–5 |
| Avg odds | 2.09 | 1.77 |
| ROI % | +5.3% | -17.4% |
| Units P/L | +0.21u | -1.74u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Last five matches per player
Alvaro Lopez San Martin
Futures 2026 ·
Jun 20
Christian Langmo
Futures 2026 ·
Jun 19
Ilyas Milad Fahim
Futures 2026 ·
Jun 18
Axel Nefve
Futures 2026 ·
Jun 16
Thomas Faurel
Savannah Challenger · Round of 32
Apr 21
Clement Tabur
Savannah Challenger · Round of 16
Apr 15
Jack Pinnington Jones
Fayez Sarofim & Co. U.S. Men's Clay Court Championship · 1st Round Qualifying
Mar 30
Stefan Kozlov
Cleveland · Quarterfinals
Jan 31
Alejo Sanchez Quilez
Copa Faulconbridge · 2nd Round Qualifying
May 12
Mario Mansilla Diez
Copa Faulconbridge · 1st Round Qualifying
May 11
Nick Hardt
Savannah Challenger · Round of 16
Apr 22
Daniil Glinka
Savannah Challenger · Round of 32
Apr 20
Strong Kirchheimer
Tallahassee Tennis Challenger · 1st Round Qualifying
Apr 12
James Duckworth
Mexico City Open presentado por Banco BX+ · Round of 16
Apr 9
Alex Rybakov
Tallahassee Tennis Challenger · Round of 32
Apr 8
Raphael Perot
Mexico City Open presentado por Banco BX+ · Round of 32
Apr 7
Cumulative head-to-head lead over time
Matches, sets and games won · Last 12 months · 3–41 matches
| Metric | Wolf | Kozlov |
|---|---|---|
| Matches won | 33% | 56% |
| Sets won | 43% | 55% |
| Games won | 46% | 52% |
Head-to-head record by tournament tier
| Stage | Wolf | Kozlov |
|---|---|---|
| Finals | 1 | 0 |
| ATP 250 | 1 | 0 |
| ATP Challenger Tour | 4 | 4 |
Head-to-head record per surface
| Surface | Wolf | Kozlov |
|---|---|---|
| Hard | 5 | 4 |
