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

451–500 of 610

Date	Tournament	Round	Winner	Loser	Score	Surface
2016-07-18	Binghamton CH	QF	Darian King	Stefan Kozlov	6-2 4-1 RET	Hard
2016-07-18	Binghamton CH	R16	Stefan Kozlov	Daniel Nguyen	7-6(7) 6-4	Hard
2016-07-18	Binghamton CH	R32	Stefan Kozlov	Dennis Nevolo	3-6 7-5 6-0	Hard
2016-07-11	Newport	R16	Donald Young	Stefan Kozlov	6-0 6-4	Grass
2016-07-11	Newport	R32	Stefan Kozlov	Benjamin Becker	6-1 6-2	Grass
2016-07-04	Winnetka CH	R16	Go Soeda	Stefan Kozlov	6-3 6-2	Hard
2016-07-04	Winnetka CH	R32	Stefan Kozlov	Sekou Bangoura	6-4 3-6 6-2	Hard
2016-06-27	Wimbledon	Q1	Daniil Medvedev	Stefan Kozlov	6-2 6-2	Grass
2016-06-13	Queen's Club	Q1	Vasek Pospisil	Stefan Kozlov	7-6(5) 7-6(6)	Grass
2016-06-06	s Hertogenbosch	QF	Sam Querrey	Stefan Kozlov	6-3 6-0	Grass
2016-06-06	s Hertogenbosch	R16	Stefan Kozlov	Steve Johnson	6-3 6-4	Grass
2016-06-06	s Hertogenbosch	R32	Stefan Kozlov	Yoshihito Nishioka	6-1 2-6 6-3	Grass
2016-05-30	Manchester CH	R16	Denis Kudla	Stefan Kozlov	6-4 6-3	Grass
2016-05-30	Manchester CH	R32	Stefan Kozlov	Adrien Bossel	6-4 6-4	Grass
2016-05-23	Vicenza CH	QF	Edoardo Eremin	Stefan Kozlov	6-1 3-6 6-3	Clay
2016-05-23	Vicenza CH	R16	Stefan Kozlov	Kimmer Coppejans	6-4 6-4	Clay
2016-05-23	Vicenza CH	R32	Stefan Kozlov	Renzo Olivo	6-3 6-4	Clay
2016-05-23	Roland Garros	Q1	Grega Zemlja	Stefan Kozlov	3-6 6-3 6-1	Clay
2016-05-09	Bordeaux CH	Q2	Jonathan Eysseric	Stefan Kozlov	6-3 6-1	Clay
2016-05-09	Bordeaux CH	Q1	Stefan Kozlov	David Guez	1-6 7-6(4) 6-3	Clay
2016-04-25	Tallahassee CH	QF	James Mcgee	Stefan Kozlov	6-3 2-6 7-6(1)	Clay
2016-04-25	Tallahassee CH	R16	Stefan Kozlov	Gerald Melzer	6-2 3-6 6-2	Clay
2016-04-25	Tallahassee CH	R32	Stefan Kozlov	Jose Hernandez	6-7(4) 7-6(4) 6-4	Clay
2016-04-25	Tallahassee CH	Q3	Stefan Kozlov	Blake Mott	7-5 4-6 6-3	Clay
2016-04-25	Tallahassee CH	Q2	Stefan Kozlov	Mico Santiago	7-5 6-2	Clay
2016-04-11	USA F13	F	Stefan Kozlov	Eric Quigley	6-7(3) 6-3 7-6(10)	Hard
2016-04-11	USA F13	SF	Stefan Kozlov	Tennys Sandgren	6-2 6-4	Hard
2016-04-11	USA F13	QF	Stefan Kozlov	Evan King	7-5 6-4	Hard
2016-04-11	USA F13	R16	Stefan Kozlov	Sebastian Fanselow	6-2 6-2	Hard
2016-04-11	USA F13	R32	Stefan Kozlov	J.J. Wolf	6-1 6-3	Hard
2016-04-04	Le Gosier CH	F	Malek Jaziri	Stefan Kozlov	6-2 6-4	Hard
2016-04-04	Le Gosier CH	SF	Stefan Kozlov	Yoshihito Nishioka	3-6 7-5 6-3	Hard
2016-04-04	Le Gosier CH	QF	Stefan Kozlov	Vincent Millot	5-7 7-5 6-2	Hard
2016-04-04	Le Gosier CH	R16	Stefan Kozlov	Constant Lestienne	6-2 3-6 6-1	Hard
2016-04-04	Le Gosier CH	R32	Stefan Kozlov	Austin Krajicek	6-3 6-4	Hard
2016-03-21	USA F11	R32	Ernesto Escobedo	Stefan Kozlov	6-3 6-4	Hard
2016-03-14	Drummondville CH	R32	Renzo Olivo	Stefan Kozlov	6-3 1-6 7-5	Hard
2016-03-07	Canada F2	F	Stefan Kozlov	Lloyd Glasspool	4-6 6-4 6-4	Hard
2016-03-07	Canada F2	SF	Stefan Kozlov	Filip Peliwo	7-5 7-5	Hard
2016-03-07	Canada F2	QF	Stefan Kozlov	Hugo Nys	6-4 7-6(5)	Hard
2016-03-07	Canada F2	R16	Stefan Kozlov	Tim Van Rijthoven	7-6(7) 6-2	Hard
2016-03-07	Canada F2	R32	Stefan Kozlov	Tyler Hochwalt	6-2 6-2	Hard
2016-02-29	Canada F1	QF	Tim Van Rijthoven	Stefan Kozlov	6-2 3-6 6-4	Hard
2016-02-29	Canada F1	R16	Stefan Kozlov	Kaichi Uchida	4-6 6-3 6-3	Hard
2016-02-29	Canada F1	R32	Stefan Kozlov	Andrew Carter	6-1 3-0 RET	Hard
2016-02-15	USA F7	QF	Victor Hanescu	Stefan Kozlov	4-6 7-6(2) 6-4	Clay
2016-02-15	USA F7	R16	Stefan Kozlov	Agustin Velotti	7-6(3) 3-6 7-6(5)	Clay
2016-02-15	USA F7	R32	Stefan Kozlov	Winston Lin	6-2 5-7 6-3	Clay
2016-02-08	Santo Domingo CH	Q2	Pere Riba	Stefan Kozlov	6-2 6-3	Clay
2016-02-08	Santo Domingo CH	Q1	Stefan Kozlov	Jesus Francisco Felix	6-1 6-2	Clay

Aliases

atp

S. Kozlov
Stefan Kozlov (ke64)

atp_short

S. Kozlov (ke64)

itf

Stefan Kozlov (800335858)

sackmann

Stefan Kozlov (111578)

variant

S Kozlov