Jeff Wolf vs Stefan Kozlov Head-to-Head Stats, Results & Performance Comparison

Wojtek Kolan

Our Predictions

H2H Records Career Stats

HEAD TO HEAD
J. Wolf vs S. Kozlov

Jeff Wolf

USA

5

Win

Played

5

Win

Age

6'0" (183 cm)

Height

6'0" (183 cm)

775

C. Rank

450

Best Rank

103

Total Titles

YTD Titles

$1.6M

Career Money

$372.0K

Right-Handed

Plays

Right-Handed

Stefan Kozlov

USA

5

Win

Played

5

Win

Age

6'0" (183 cm)

Height

6'0" (183 cm)

775

C. Rank

450

Best Rank

103

Total Titles

YTD Titles

$1.6M

Career Money

$372.0K

Right-Handed

Plays

Right-Handed

Head-to-head: Wolf 5 - 5 Kozlov

They have played 22 sets in total, with Jeff Wolf winning 12 and Stefan Kozlov winning 10. The last match between Jeff Wolf and Stefan Kozlov was at the Cleveland Challenger, 31-01-2025, Round: QF, Surface: I.hard, with Jeff Wolf getting the victory 6-1 6-3.

Players	Head To Head Match Wins
Wolf	5
Kozlov	5

Last 10 H2H Matches:

(QF) Cleveland Challenger(01-31-25)

Stats

Jeff Wolf

Stefan Kozlov

(QF) Bloomfield Hills Challenger(07-05-24)

Stats

Stefan Kozlov

Jeff Wolf

(R1) San Diego Open - San Diego(09-19-22)

Stats

Jeff Wolf

Stefan Kozlov

J. Wolf vs S. Kozlov H2H Profile

J. Wolf	Stats	S. Kozlov
$1,640,225	Career Prize Money	$371,951
56.84% (187-142)	Career Total W/L	56.71% (338-258)
2	Hard	2
3	Indoor	3
6	Titles	10
5	Total H2H Matches	5
0% (0-0)	YTD Win/Loss	0% (0-0)

J. Wolf vs S. Kozlov Match Preview:

Second serve performance recent form: In recent form (last 6 months), Jeff Wolf has won 0% of points on their second serve, while Stefan Kozlov has won 44.58%. There is a high correlation between this stat and match prediction accuracy.
Return game stats recent form: Return stats show Jeff Wolf, in recent form, has won 0% of their opponent's second serve points, while Stefan Kozlov has won 49.45%. The same stats for first serve returns are 0% and 30.94% respectively and this has a high correlation to pick who is favored in this H2H matchup.
Under pressure analysis: Jeff Wolf has saved 0% of breakpoints in recent form, whereas Stefan Kozlov has saved 49.06% which is a useful statistic for in-game betting predictions.
Performance overview: Over the last year Jeff Wolf has won 60.00% of matches played (W/L 6/4), with Stefan Kozlov winning 65.63% (W/L 21/11) that gives us an overall head-to head prediction overview.
Best surface: Jeff Wolf has their best career surface win % on I.hard, winning 64% (W/L 69/39), and worse career win % on Clay, winning 48% (W/L 20/22). Stefan Kozlov has their best career surface win % on I.hard, winning 64% (W/L 80/47), and worse career win % on Grass, winning 38% (W/L 15/24).
Player level: In the last year, Jeff Wolf has played most of their matches on the Challengers/ITF tournaments > $10K, winning 66.67% of matches (W/L 6/3), where as Stefan Kozlov has played most of their matches on the Challengers/ITF tournaments > $10K, winning 62.50% of matches (W/L 15/9). When comparing stats between players to predict the favorite, it is of course all relative to the event level they have been playing at.
Direct H2H matches: They have played 10 times before with Jeff Wolf winning 5 times and Stefan Kozlov being victorious 5 times. They have played 22 sets in total, with Jeff Wolf winning 12 and Stefan Kozlov winning 10.
The last match between Jeff Wolf and Stefan Kozlov was at the Cleveland Challenger, 31-01-2025, Round: QF, Surface: I.hard, with Jeff Wolf getting the victory 6-1 6-3.
Head to head match duration: In past head to head matches, the average match time between these players has been 1:38:13.
Opponent quality stats: Over the last 12 months, Jeff Wolf has played against opponents with an average rank of 221.3 while Stefan Kozlov has played against players with an average rank of 409.19.
Deciding set performance vs all players: If you are interested in live predictions and betting, if this match goes into a deciding set, Jeff Wolf has won 33% of deciding sets over the last 12 months, while Stefan Kozlov has won 64% in all matches played on tour.
Break point conversion: In recent form, Jeff Wolf has converted 0% of breakpoint opportunities, and Stefan Kozlov has converted 37.29% of their chances to break their opponents serve. A telling stat for in-game live betting tips when either player has a breakpoint opportunity.

Jeff Wolf vs Stefan Kozlov Editorial Preview By TennisTipster88.

J. Wolf vs S. Kozlov H2H Stats Used In Our Predictions

J. Wolf	Stats	S. Kozlov
5	H2H Matches Won	5
12	Sets Won	10
101	Games Won	101
37	Aces (Total)	25
30	Total Double Faults	26
1:38:13	Average Match Time	1:38:13
59% (400/681)	1st Serve %	61% (379/625)
67% (266/400)	1st Serve Win %	63% (238/379)
46% (128/281)	2nd Serve Win %	50% (124/246)
45% (31/69)	Break Pts Won %	48% (34/71)
42% (263/625)	Return Points Win %	42% (287/681)
50% (5/10)	Best‑of‑3 Win %	50% (5/10)
0% (0/2)	Deciding Set Win %	100% (2/2)
83% (5/6)	1st Set Won, Won Match	100% (4/4)
17% (1/6)	1st Set Won, Lost Match	0% (0/4)
0% (0/4)	1st Set Lost, Won Match	17% (1/6)

Recent Performance Stats

J. Wolf Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Delray Beach Open - Delray Beach - 10-02-2025
Q1 Tristan BoyerT. Boyer	L	2-1 ret.	Stats
Cleveland Challenger - 27-01-2025
SF Colton SmithC. Smith	L	7-6(7) 6-1	Stats
QF Stefan KozlovS. Kozlov	W	6-1 6-3	Stats
R2 Antoine GhibaudoA. Ghibaudo	W	7-6(11) 4-6 6-3	Stats
R1 Jenson BrooksbyJ. Brooksby	W	6-2 6-4	Stats

View All

S. Kozlov Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Chicago Challenger - 04-08-2025
Q3 Tsung-Hao HuangT. Huang	L	1-6 7-5 6-2	Stats
Q1 Ramkumar RamanathanR. Ramanathan	W	6-1 6-7(4) 5-3 ret.	Stats
Newport Challenger - 07-07-2025
R1 Mitchell KruegerM. Krueger	L	6-1 3-6 6-1	Stats
Tyler Challenger - 02-06-2025
Q3 Alvin Nicholas TudoricaA. Nicholas	L	7-5 6-3	Stats
Q1 Daniel MilavskyD. Milavsky	W	6-3 6-7(7) 6-3	Stats

View All

J. Wolf vs S. Kozlov Stats Breakdown Vs All H2H Opponents

J. Wolf	Stats	S. Kozlov
56.84% (187/142)	YTD Win/Loss	56.71% (338/258)
55.04% (426/348)	Sets Win/Loss	53.99% (758/646)
52.04% (3873/3569)	Games Win/Loss	51.48% (6727/6339)
54.97% (94/77)	Hard Win/Loss	55.33% (166/134)
47.62% (20/22)	Clay Win/Loss	59.23% (77/53)
63.89% (69/39)	Indoor Hard W/L	62.99% (80/47)
50.00% (4/4)	Grass Win/Loss	38.46% (15/24)
0.64	Aces Per Game	0.22
2343	Aces Total	1430
0.3	Double Faults Per Game	0.33
1076	Total Double Faults	2102
1:39:48	Average Match Time	1:35:5
402.15	Average Opponent Rank	565.04
57% (13226/23086)	1st Serve %	61% (22789/37267)
74% (9776/13226)	1st Serve Win %	66% (15079/22789)
51% (5004/9860)	2nd Serve Win %	48% (6985/14478)
41% (870/2108)	Break Points Won % (Total)	42% (1766/4187)
38% (8866/23317)	Return Points Win %	42% (15694/37759)
46.67% (14/16)	Slam W/L	31.03% (9/20)
47.73% (21/23)	Masters W/L	23.53% (4/13)
51.28% (40/38)	Main Tour W/L	38.81% (26/41)
63.58% (103/59)	Challenger W/L	58.06% (198/143)
60.00% (9/6)	Futures W/L	71.13% (101/41)
57% (175/307)	Best of 3 Sets Win %	57% (330/578)
50% (9/18)	Best of 5 Sets Win %	45% (5/11)
50% (55/109)	Tiebreaks Win % (Total)	48% (68/143)
53% (50/95)	Deciding Set Win %	61% (127/207)
89% (176/156)	1st Set Won, Won Match	87% (310/270)
11% (176/20)	1st Set Won, Lost Match	12% (310/38)
18% (153/28)	1st Set Lost, Won Match	24% (286/68)