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

351–400 of 610

Date	Tournament	Round	Winner	Loser	Score	Surface
2018-02-26	Indian Wells CH	R32	Stefan Kozlov	Mirza Basic	7-5 6-4	Hard
2018-02-19	Delray Beach	Q1	Ramkumar Ramanathan	Stefan Kozlov	6-3 6-2	Hard
2018-01-29	Dallas CH	R32	Frances Tiafoe	Stefan Kozlov	6-2 7-6(5)	Hard
2018-01-22	Newport Beach CH	R16	Miomir Kecmanovic	Stefan Kozlov	6-3 6-4	Hard
2018-01-22	Newport Beach CH	R32	Stefan Kozlov	Guilherme Clezar	6-2 6-3	Hard
2018-01-15	Australian Open	Q3	Dustin Brown	Stefan Kozlov	6-4 3-6 6-3	Hard
2018-01-15	Australian Open	Q2	Stefan Kozlov	Yannick Hanfmann	4-6 7-6(2) 6-4	Hard
2018-01-15	Australian Open	Q1	Stefan Kozlov	Blake Ellis	7-6(3) 4-6 7-6(3)	Hard
2018-01-01	Noumea CH	R32	Corentin Moutet	Stefan Kozlov	7-6(4) 3-6 6-2	Hard
2017-11-06	Knoxville CH	R32	Tim Smyczek	Stefan Kozlov	7-6(3) 6-2	Hard
2017-10-30	Charlottesville CH	SF	Tim Smyczek	Stefan Kozlov	6-3 2-6 6-2	Hard
2017-10-30	Charlottesville CH	QF	Stefan Kozlov	Denis Kudla	6-4 6-3	Hard
2017-10-30	Charlottesville CH	R16	Stefan Kozlov	Liam Broady	6-4 4-6 6-4	Hard
2017-10-30	Charlottesville CH	R32	Stefan Kozlov	Thai Son Kwiatkowski	6-1 3-6 6-3	Hard
2017-10-16	Las Vegas CH	F	Stefan Kozlov	Liam Broady	3-6 7-5 6-4	Hard
2017-10-16	Las Vegas CH	SF	Stefan Kozlov	Tennys Sandgren	6-3 7-6(6)	Hard
2017-10-16	Las Vegas CH	QF	Stefan Kozlov	Kevin King	6-2 6-3	Hard
2017-10-16	Las Vegas CH	R16	Stefan Kozlov	Dominik Koepfer	6-4 6-1	Hard
2017-10-16	Las Vegas CH	R32	Stefan Kozlov	Jc Aragone	7-5 6-3	Hard
2017-10-09	Fairfield CH	R32	Mackenzie Mcdonald	Stefan Kozlov	6-4 5-7 6-1	Hard
2017-10-02	Stockton CH	QF	Darian King	Stefan Kozlov	6-4 6-4	Hard
2017-10-02	Stockton CH	R16	Stefan Kozlov	Denis Kudla	6-4 6-4	Hard
2017-10-02	Stockton CH	R32	Stefan Kozlov	Brayden Schnur	6-3 6-2	Hard
2017-08-28	US Open	Q1	Guido Andreozzi	Stefan Kozlov	6-4 6-1	Hard
2017-08-14	Cincinnati Masters	R64	Sam Querrey	Stefan Kozlov	6-3 6-0	Hard
2017-07-31	Washington	R64	Yuki Bhambri	Stefan Kozlov	7-5 2-0 RET	Hard
2017-07-24	Atlanta	R32	Quentin Halys	Stefan Kozlov	7-5 7-6(7)	Hard
2017-07-24	Atlanta	Q2	Stefan Kozlov	Brydan Klein	6-7(9) 6-2 7-6(4)	Hard
2017-07-24	Atlanta	Q1	Stefan Kozlov	Catalin Ionut Gard	6-3 6-1	Hard
2017-07-17	Newport	R32	Adrian Menendez Maceiras	Stefan Kozlov	6-2 7-6(5)	Grass
2017-07-03	Wimbledon	Q2	Dennis Novikov	Stefan Kozlov	7-5 6-2	Grass
2017-07-03	Wimbledon	Q1	Stefan Kozlov	Marc Polmans	6-4 7-5	Grass
2017-06-19	Queen's Club	R16	Marin Cilic	Stefan Kozlov	6-0 6-4	Grass
2017-06-19	Queen's Club	R32	Stefan Kozlov	Steve Johnson	3-6 6-1 6-1	Grass
2017-06-19	Queen's Club	Q2	Stefan Kozlov	Pierre Hugues Herbert	6-4 6-2	Grass
2017-06-19	Queen's Club	Q1	Stefan Kozlov	Kenny De Schepper	6-7(4) 6-3 6-4	Grass
2017-06-12	s Hertogenbosch	R16	Ivo Karlovic	Stefan Kozlov	6-4 6-1	Grass
2017-06-12	s Hertogenbosch	R32	Stefan Kozlov	Dustin Brown	6-3 3-6 6-3	Grass
2017-06-05	Surbiton CH	R32	Akira Santillan	Stefan Kozlov	6-2 2-6 6-3	Grass
2017-05-29	Roland Garros	Q2	Sergiy Stakhovsky	Stefan Kozlov	6-7(5) 6-4 6-4	Clay
2017-05-29	Roland Garros	Q1	Stefan Kozlov	Corentin Moutet	2-6 7-5 6-4	Clay
2017-05-15	Heilbronn CH	R32	Tobias Kamke	Stefan Kozlov	6-4 5-7 7-6(4)	Clay
2017-05-01	Savannah CH	QF	Joao Pedro Sorgi	Stefan Kozlov	6-2 6-2	Clay
2017-05-01	Savannah CH	R16	Stefan Kozlov	Ramkumar Ramanathan	6-1 6-2	Clay
2017-05-01	Savannah CH	R32	Stefan Kozlov	Mikelis Libietis	6-3 6-4	Clay
2017-04-24	Tallahassee CH	QF	Mitchell Krueger	Stefan Kozlov	6-4 7-5	Clay
2017-04-24	Tallahassee CH	R16	Stefan Kozlov	Jurgen Melzer	2-6 6-3 6-4	Clay
2017-04-24	Tallahassee CH	R32	Stefan Kozlov	Federico Coria	6-3 4-6 6-4	Clay
2017-04-17	Bradenton CH	R16	Horacio Zeballos	Stefan Kozlov	6-1 7-6(3)	Clay
2017-04-17	Bradenton CH	R32	Stefan Kozlov	Peter Polansky	6-4 6-4	Clay

Aliases

atp

S. Kozlov
Stefan Kozlov (ke64)

atp_short

S. Kozlov (ke64)

itf

Stefan Kozlov (800335858)

sackmann

Stefan Kozlov (111578)

variant

S Kozlov