Player

🇺🇸 Stefan Kozlov

Career matches 610

Wins 340

Losses 270

Win rate 55.7%

Elo (current) 2,170 2026-04-22

Surface breakdown

Hard 56.9% 252W – 191L (443 matches)

Clay 56.8% 75W – 57L (132 matches)

Grass 37.1% 13W – 22L (35 matches)

Career form (last 10)

WLLWWWLLLW

Newest on left. Hover for details.

Head-to-head (top 5 opponents)

Opponent	Played	W	L	W%
J.J. Wolf	10	5	5	50%
Mitchell Krueger	10	5	5	50%
Tennys Sandgren	9	6	3	67%
Steve Johnson	8	5	3	63%
Darian King	7	1	6	14%

Recent matches

201–250 of 610

Date	Tournament	Round	Winner	Loser	Score	Surface
2021-11-15	Champaign CH	R16	Stefan Kozlov	Keegan Smith	6-3 6-1	Hard
2021-11-15	Champaign CH	R32	Stefan Kozlov	Jc Aragone	3-6 6-3 6-4	Hard
2021-11-08	Knoxville CH	R16	Aidan Mchugh	Stefan Kozlov	6-4 6-4	Hard
2021-11-08	Knoxville CH	R32	Stefan Kozlov	Aleksandar Vukic	6-3 4-6 7-5	Hard
2021-11-01	Charlottesville CH	F	Stefan Kozlov	Aleksandar Vukic	6-2 6-3	Hard
2021-11-01	Charlottesville CH	SF	Stefan Kozlov	J.J. Wolf	6-1 6-7(1) 6-0	Hard
2021-11-01	Charlottesville CH	QF	Stefan Kozlov	Emilio Nava	6-4 6-2	Hard
2021-11-01	Charlottesville CH	R16	Stefan Kozlov	Jason Kubler	6-3 6-1	Hard
2021-11-01	Charlottesville CH	R32	Stefan Kozlov	Bjorn Fratangelo	7-5 6-2	Hard
2021-10-25	Las Vegas CH	F	J.J. Wolf	Stefan Kozlov	6-4 6-4	Hard
2021-10-25	Las Vegas CH	SF	Stefan Kozlov	Aleksandar Kovacevic	6-2 6-4	Hard
2021-10-25	Las Vegas CH	QF	Stefan Kozlov	Emilio Gomez	7-6(3) 6-4	Hard
2021-10-25	Las Vegas CH	R16	Stefan Kozlov	Aidan Mchugh	6-2 5-7 7-6(13)	Hard
2021-10-25	Las Vegas CH	R32	Stefan Kozlov	Sasi Kumar Mukund	6-2 6-4	Hard
2021-10-04	Indian Wells Masters	Q2	Christopher Eubanks	Stefan Kozlov	2-6 6-0 7-5	Hard
2021-10-04	Indian Wells Masters	Q1	Stefan Kozlov	Jason Jung	6-3 3-6 5-2 RET	Hard
2021-09-20	Columbus CH	F	Stefan Kozlov	Max Purcell	4-6 6-2 6-4	Hard
2021-09-20	Columbus CH	SF	Stefan Kozlov	J.J. Wolf	2-6 6-3 7-5	Hard
2021-09-20	Columbus CH	QF	Stefan Kozlov	Mikael Torpegaard	2-6 7-6(4) 6-4	Hard
2021-09-20	Columbus CH	R16	Stefan Kozlov	Jason Kubler	6-2 7-5	Hard
2021-09-20	Columbus CH	R32	Stefan Kozlov	Mitchell Krueger	6-0 6-3	Hard
2021-09-13	Cary 2 CH	R32	Zachary Svajda	Stefan Kozlov	7-5 2-0 RET	Hard
2021-09-06	Kyiv CH	R32	Franco Agamenone	Stefan Kozlov	6-4 7-5	Clay
2021-08-30	Manacor CH	R16	Fernando Verdasco	Stefan Kozlov	1-6 7-6(6) 6-2	Hard
2021-08-30	Manacor CH	R32	Stefan Kozlov	Daniel Rincon	6-3 1-6 6-1	Hard
2021-08-30	Us Open	Q1	Bernabe Zapata Miralles	Stefan Kozlov	7-5 1-6 6-3	Hard
2021-07-26	Lexington CH	R16	Alejandro Tabilo	Stefan Kozlov	6-2 6-2	Hard
2021-07-26	Lexington CH	R32	Stefan Kozlov	Christopher Eubanks	7-6(3) 7-6(6)	Hard
2021-07-26	Lexington CH	Q2	Stefan Kozlov	Edan Leshem	3-6 7-6(4) 6-1	Hard
2021-07-26	Lexington CH	Q1	Stefan Kozlov	Sam Riffice	6-2 6-3	Hard
2021-07-19	Cary 1 CH	SF	Ramkumar Ramanathan	Stefan Kozlov	1-6 6-3 6-1	Hard
2021-07-19	Cary 1 CH	QF	Stefan Kozlov	Christopher Eubanks	5-7 6-1 6-3	Hard
2021-07-19	Cary 1 CH	R16	Stefan Kozlov	Maxime Cressy	3-6 6-3 6-4	Hard
2021-07-19	Cary 1 CH	R32	Stefan Kozlov	Donald Young	4-6 6-4 6-4	Hard
2021-06-28	M15 Weston FL	F	Liam Draxl	Stefan Kozlov	6-7(5) 6-3 ABD	Clay
2021-06-28	M15 Weston FL	SF	Stefan Kozlov	Ryan Harrison	5-7 6-3 6-3	Clay
2021-06-28	M15 Weston FL	QF	Stefan Kozlov	Christian Langmo	6-2 7-5	Clay
2021-06-28	M15 Weston FL	R16	Stefan Kozlov	Ben Shelton	7-5 6-1	Clay
2021-06-28	M15 Weston FL	R32	Stefan Kozlov	Evan Zhu	6-3 3-6 6-1	Clay
2021-06-14	M25 Tulsa OK	R32	Michail Pervolarakis	Stefan Kozlov	7-6(4) 6-4	Hard
2021-06-07	Orlando 2 CH	R32	Thiago Agustin Tirante	Stefan Kozlov	6-3 6-1	Hard
2021-06-07	Orlando 2 CH	Q2	Stefan Kozlov	Adrian Andreev	4-6 6-4 6-4	Hard
2021-06-07	Orlando 2 CH	Q1	Stefan Kozlov	Robert Galloway	6-4 7-6(4)	Hard
2021-05-31	Little Rock CH	R32	Thai Son Kwiatkowski	Stefan Kozlov	6-2 6-1	Hard
2021-05-31	Little Rock CH	Q2	Stefan Kozlov	Strong Kirchheimer	6-3 6-2	Hard
2021-05-31	Little Rock CH	Q1	Stefan Kozlov	Brian Battistone	6-2 6-2	Hard
2021-03-15	Acapulco	R32	Cameron Norrie	Stefan Kozlov	6-3 6-3	Hard
2021-03-15	Acapulco	Q3	Stefan Kozlov	Botic Van De Zandschulp	6-3 1-0 RET	Hard
2021-03-15	Acapulco	Q2	Stefan Kozlov	Joao Sousa	6-2 2-6 6-3	Hard
2021-03-15	Acapulco	Q1	Stefan Kozlov	Jordi Arconada	6-4 6-1	Hard

Aliases

atp

S. Kozlov
Stefan Kozlov (ke64)

atp_short

S. Kozlov (ke64)

itf

Stefan Kozlov (800335858)

sackmann

Stefan Kozlov (111578)

variant

S Kozlov