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

301–350 of 610

Date	Tournament	Round	Winner	Loser	Score	Surface
2019-04-22	Tallahassee CH	R64	Stefan Kozlov	Alexander Zhurbin	4-6 6-4 6-0	Clay
2019-04-08	M15 Sunrise FL	R16	Dmitry Popko	Stefan Kozlov	7-5 6-3	Clay
2019-04-08	M15 Sunrise FL	R32	Stefan Kozlov	Mateus Alves	6-3 6-1	Clay
2019-03-18	M25 Calabasas CA	F	Alexander Ritschard	Stefan Kozlov	6-2 0-6 7-6(5)	Hard
2019-03-18	M25 Calabasas CA	SF	Stefan Kozlov	Drew Baird	6-2 6-2	Hard
2019-03-18	M25 Calabasas CA	QF	Stefan Kozlov	Jonathan Gray	6-2 6-1	Hard
2019-03-18	M25 Calabasas CA	R16	Stefan Kozlov	Isaiah Strode	7-6(3) 6-0	Hard
2019-03-18	M25 Calabasas CA	R32	Stefan Kozlov	Ronnie Schneider	6-2 6-0	Hard
2019-03-11	Drummondville CH	R64	Gijs Brouwer	Stefan Kozlov	7-5 6-3	Hard
2019-02-18	Cuernavaca CH	R16	Roberto Quiroz	Stefan Kozlov	6-4 7-6(5)	Hard
2019-02-18	Cuernavaca CH	R32	Stefan Kozlov	Alexander Sarkissian	6-4 3-0 RET	Hard
2019-02-18	Cuernavaca CH	R64	Stefan Kozlov	Evan Song	7-5 6-3	Hard
2019-02-04	Dallas CH	R64	Alex Rybakov	Stefan Kozlov	6-2 6-1	Hard
2019-01-28	Cleveland CH	R32	Brayden Schnur	Stefan Kozlov	7-6(5) 6-4	Hard
2019-01-28	Cleveland CH	R64	Stefan Kozlov	Louis Wessels	6-4 5-7 7-5	Hard
2019-01-21	Newport Beach CH	Q1	Maxime Cressy	Stefan Kozlov	7-5 6-1	Hard
2019-01-07	Columbus CH	R64	J.J. Wolf	Stefan Kozlov	6-2 7-6(4)	Hard
2018-12-31	Orlando CH	R16	Nino Serdarusic	Stefan Kozlov	6-2 7-5	Hard
2018-12-31	Orlando CH	R32	Stefan Kozlov	Mitchell Krueger	6-2 5-7 6-3	Hard
2018-12-31	Orlando CH	R64	Stefan Kozlov	Alejandro Gonzalez	6-2 4-6 6-4	Hard
2018-11-12	Houston CH	R32	Paolo Lorenzi	Stefan Kozlov	6-4 3-6 6-4	Hard
2018-11-05	Knoxville CH	Q1	Evan Song	Stefan Kozlov	6-4 3-6 6-3	Hard
2018-10-29	Charlottesville CH	Q2	Petros Chrysochos	Stefan Kozlov	1-6 6-3 6-2	Hard
2018-10-29	Charlottesville CH	Q1	Stefan Kozlov	Emil Reinberg	3-6 7-6(4) 6-1	Hard
2018-10-22	Las Vegas CH	R32	Kamil Majchrzak	Stefan Kozlov	6-0 6-2	Hard
2018-10-15	Calgary CH	R32	Jan Choinski	Stefan Kozlov	6-3 6-3	Hard
2018-10-01	Monterrey CH	R32	Lucas Gomez	Stefan Kozlov	6-2 6-4	Hard
2018-08-06	Aptos CH	R32	Kaichi Uchida	Stefan Kozlov	6-4 6-1	Hard
2018-07-30	Washington	Q1	Jared Hiltzik	Stefan Kozlov	6-3 6-3	Hard
2018-07-02	Wimbledon	Q2	Yannick Maden	Stefan Kozlov	6-1 6-3	Grass
2018-07-02	Wimbledon	Q1	Stefan Kozlov	Dustin Brown	6-3 6-1	Grass
2018-06-18	Ilkley CH	Q1	Brydan Klein	Stefan Kozlov	4-6 6-1 7-5	Grass
2018-06-11	Nottingham CH	R32	Christopher Eubanks	Stefan Kozlov	6-3 6-3	Grass
2018-06-04	Surbiton CH	Q1	Daniel Evans	Stefan Kozlov	6-1 6-0	Grass
2018-05-28	Vicenza CH	Q2	Martin Cuevas	Stefan Kozlov	6-4 6-1	Clay
2018-05-28	Vicenza CH	Q1	Stefan Kozlov	Edoardo Sardella	6-1 6-2	Clay
2018-05-28	Roland Garros	Q1	Yasutaka Uchiyama	Stefan Kozlov	6-4 7-5	Clay
2018-05-14	Bordeaux CH	QF	Reilly Opelka	Stefan Kozlov	7-6(4) 6-1	Clay
2018-05-14	Bordeaux CH	R16	Stefan Kozlov	Antoine Hoang	6-3 7-6(4)	Clay
2018-05-14	Bordeaux CH	R32	Stefan Kozlov	Pierre Hugues Herbert	6-2 7-6(5)	Clay
2018-05-07	Aix En Provence CH	R32	Constant Lestienne	Stefan Kozlov	7-6(2) 6-4	Clay
2018-04-16	Sarasota CH	QF	Hugo Dellien	Stefan Kozlov	5-7 6-1 7-6(6)	Clay
2018-04-16	Sarasota CH	R16	Stefan Kozlov	Donald Young	6-4 6-4	Clay
2018-04-16	Sarasota CH	R32	Stefan Kozlov	Mitchell Krueger	6-4 6-3	Clay
2018-04-09	Houston	R32	Guido Pella	Stefan Kozlov	6-3 6-2	Clay
2018-04-09	Houston	Q2	Stefan Kozlov	Akira Santillan	6-2 6-0	Clay
2018-04-09	Houston	Q1	Stefan Kozlov	Thomaz Bellucci	6-7(3) 6-3 7-6(5)	Clay
2018-03-19	Miami Masters	Q1	Cameron Norrie	Stefan Kozlov	6-1 2-0 RET	Hard
2018-03-05	Indian Wells CH	Q1	Adrian Menendez Maceiras	Stefan Kozlov	6-2 7-6(8)	Hard
2018-02-26	Indian Wells CH	R16	Peter Polansky	Stefan Kozlov	6-2 6-4	Hard

Aliases

atp

S. Kozlov
Stefan Kozlov (ke64)

atp_short

S. Kozlov (ke64)

itf

Stefan Kozlov (800335858)

sackmann

Stefan Kozlov (111578)

variant

S Kozlov