James Duckworth vs Stefan Kozlov Head-to-Head Stats, Results & Performance Comparison

Wojtek Kolan

Our Predictions

H2H Records Career Stats

HEAD TO HEAD
J. Duckworth vs S. Kozlov

James Duckworth

AUS

1

Win

Played

0

Win

Age

6'0" (183 cm)

Height

6'0" (183 cm)

106

C. Rank

458

Best Rank

103

Total Titles

YTD Titles

$1.9M

Career Money

$372.0K

Right-Handed

Plays

Right-Handed

Stefan Kozlov

USA

1

Win

Played

0

Win

Age

6'0" (183 cm)

Height

6'0" (183 cm)

106

C. Rank

458

Best Rank

103

Total Titles

YTD Titles

$1.9M

Career Money

$372.0K

Right-Handed

Plays

Right-Handed

Head-to-head: Duckworth 1 - 0 Kozlov

They have played 2 sets in total, with James Duckworth winning 2 and Stefan Kozlov winning 0. The last match between James Duckworth and Stefan Kozlov was at the Las Vegas Challenger, 18-10-2019, Round: QF, Surface: Hard, with James Duckworth getting the victory 6-2 6-3.

Players	Head To Head Match Wins
Duckworth	1
Kozlov	0

Last 1 H2H Matches:

(QF) Las Vegas Challenger(10-18-19)

Stats

James Duckworth

Stefan Kozlov

J. Duckworth vs S. Kozlov H2H Profile

J. Duckworth	Stats	S. Kozlov
$1,878,002	Career Prize Money	$371,951
59.79% (519-349)	Career Total W/L	56.98% (343-259)
1	Hard	0
23	Titles	10
1	Total H2H Matches	0
40.00% (8-12)	YTD Win/Loss	0% (0-0)

J. Duckworth vs S. Kozlov Match Preview:

Second serve performance recent form: In recent form (last 6 months), James Duckworth has won 48.07% of points on their second serve, while Stefan Kozlov has won 46.37%. There is a high correlation between this stat and match prediction accuracy.
Return game stats recent form: Return stats show James Duckworth, in recent form, has won 43.28% of their opponent's second serve points, while Stefan Kozlov has won 47.94%. The same stats for first serve returns are 20.91% and 29.27% respectively and this has a high correlation to pick who is favored in this H2H matchup.
Under pressure analysis: James Duckworth has saved 57.32% of breakpoints in recent form, whereas Stefan Kozlov has saved 50.00% which is a useful statistic for in-game betting predictions.
Performance overview: Over the last year James Duckworth has won 53.52% of matches played (W/L 38/33), with Stefan Kozlov winning 69.44% (W/L 25/11) that gives us an overall head-to head prediction overview.
Best surface: James Duckworth has their best career surface win % on Clay, winning 63% (W/L 109/63), and worse career win % on Grass, winning 53% (W/L 51/45). Stefan Kozlov has their best career surface win % on I.hard, winning 63% (W/L 85/48), and worse career win % on Grass, winning 38% (W/L 15/24).
Player level: In the last year, James Duckworth has played most of their matches on the Main tour, winning 53.57% of matches (W/L 15/13), where as Stefan Kozlov has played most of their matches on the Challengers/ITF tournaments > $10K, winning 67.86% of matches (W/L 19/9). 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 1 times before with James Duckworth winning 1 times and Stefan Kozlov being victorious 0 times. They have played 2 sets in total, with James Duckworth winning 2 and Stefan Kozlov winning 0.
The last match between James Duckworth and Stefan Kozlov was at the Las Vegas Challenger, 18-10-2019, Round: QF, Surface: Hard, with James Duckworth getting the victory 6-2 6-3.
Head to head match duration: In past head to head matches, the average match time between these players has been 1:26:55.
Opponent quality stats: Over the last 12 months, James Duckworth has played against opponents with an average rank of 233.65 while Stefan Kozlov has played against players with an average rank of 402.42.
Deciding set performance vs all players: If you are interested in live predictions and betting, if this match goes into a deciding set, James Duckworth has won 45% of deciding sets over the last 12 months, while Stefan Kozlov has won 67% in all matches played on tour.
Break point conversion: In recent form, James Duckworth has converted 31.11% of breakpoint opportunities, and Stefan Kozlov has converted 38.68% of their chances to break their opponents serve. A telling stat for in-game live betting tips when either player has a breakpoint opportunity.

James Duckworth vs Stefan Kozlov Editorial Preview By TennisTipster88.

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

J. Duckworth	Stats	S. Kozlov
1	H2H Matches Won	0
2	Sets Won	0
12	Games Won	5
5	Aces (Total)	0
3	Total Double Faults	2
1:26:55	Average Match Time	1:26:55
41% (22/54)	1st Serve %	72% (51/71)
77% (17/22)	1st Serve Win %	53% (27/51)
56% (18/32)	2nd Serve Win %	40% (8/20)
42% (5/12)	Break Pts Won %	50% (1/2)
51% (36/71)	Return Points Win %	35% (19/54)
100% (1/1)	Best‑of‑3 Win %	0% (0/1)
100% (1/1)	1st Set Won, Won Match	0% (0/0)
0% (0/1)	1st Set Won, Lost Match	0% (0/0)
0% (0/0)	1st Set Lost, Won Match	0% (0/1)

Recent Performance Stats

J. Duckworth Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Brisbane 3 Challenger - 10-11-2025
QF Alex BoltA. Bolt	L	7-5 6-1	Stats
R2 Blake EllisB. Ellis	W	3-6 6-1 6-4	Stats
R1 Omar JasikaO. Jasika	W	6-0 3-2 ret.	Stats
Taipei Challenger - 03-11-2025
F Yoshihito NishiokaY. Nishioka	L	7-5 7-6(5)	Stats
SF Chak Lam Coleman WongC. Lam	W	6-3 6-4	Stats

View All

S. Kozlov Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Champaign Challenger - 10-11-2025
SF Cedrik-Marcel StebeC. Stebe	W	6-0 4-0 ret.	Stats
QF Darwin BlanchD. Blanch	W	6-2 6-7(7) 6-3	Stats
R2 Tyler ZinkT. Zink	W	6-3 6-3	Stats
R1 Leo BorgL. Borg	W	6-1 6-0	Stats
Knoxville Challenger - 03-11-2025
R2 Jay ClarkeJ. Clarke	L	6-2 2-6 6-3	Stats

View All

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

J. Duckworth	Stats	S. Kozlov
59.79% (519/349)	YTD Win/Loss	56.98% (343/259)
57.28% (1204/898)	Sets Win/Loss	54.19% (769/650)
52.47% (10944/9915)	Games Win/Loss	51.59% (6805/6385)
60.04% (302/201)	Hard Win/Loss	55.33% (166/134)
63.37% (109/63)	Clay Win/Loss	59.23% (77/53)
58.76% (57/40)	Indoor Hard W/L	63.91% (85/48)
53.13% (51/45)	Grass Win/Loss	38.46% (15/24)
0.57	Aces Per Game	0.23
5791	Aces Total	1451
0.19	Double Faults Per Game	0.33
1903	Total Double Faults	2114
1:27:10	Average Match Time	1:35:8
501.18	Average Opponent Rank	564.05
57% (32101/56693)	1st Serve %	61% (23022/37635)
75% (24160/32101)	1st Serve Win %	66% (15251/23022)
53% (13116/24588)	2nd Serve Win %	48% (7063/14613)
38% (1826/4746)	Break Points Won % (Total)	42% (1791/4238)
36% (20931/57351)	Return Points Win %	42% (15887/38168)
37.78% (34/56)	Slam W/L	31.03% (9/20)
52.73% (29/26)	Masters W/L	23.53% (4/13)
0.00% (0/2)	Cups W/L	0% (0/0)
48.96% (94/98)	Main Tour W/L	38.81% (26/41)
66.98% (282/139)	Challenger W/L	58.50% (203/144)
74.53% (79/27)	Futures W/L	71.13% (101/41)
62% (500/802)	Best of 3 Sets Win %	57% (335/584)
27% (15/55)	Best of 5 Sets Win %	45% (5/11)
54% (227/418)	Tiebreaks Win % (Total)	48% (69/145)
54% (159/296)	Deciding Set Win %	61% (129/210)
85% (505/430)	1st Set Won, Won Match	87% (315/275)
14% (505/72)	1st Set Won, Lost Match	12% (315/38)
24% (362/87)	1st Set Lost, Won Match	24% (287/68)