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

401–450 of 610

Date	Tournament	Round	Winner	Loser	Score	Surface
2017-04-17	Bradenton CH	Q3	Blaz Rola	Stefan Kozlov	2-6 6-4 6-2	Clay
2017-04-17	Bradenton CH	Q2	Stefan Kozlov	Axel Geller	6-1 6-2	Clay
2017-04-17	Bradenton CH	Q1	Stefan Kozlov	Sathi Reddy	6-0 6-0	Clay
2017-04-10	San Luis Potosi CH	R32	Miomir Kecmanovic	Stefan Kozlov	6-2 7-5	Clay
2017-04-03	Panama City CH	R32	Blaz Rola	Stefan Kozlov	6-1 7-6(6)	Clay
2017-03-27	Leon CH	R16	Rajeev Ram	Stefan Kozlov	6-1 7-6(4)	Hard
2017-03-27	Leon CH	R32	Stefan Kozlov	Danilo Petrovic	6-4 6-2	Hard
2017-03-20	Miami Masters	Q2	Jared Donaldson	Stefan Kozlov	7-5 6-3	Hard
2017-03-20	Miami Masters	Q1	Stefan Kozlov	Nicola Kuhn	6-3 3-6 6-3	Hard
2017-03-06	Indian Wells Masters	R128	Donald Young	Stefan Kozlov	7-5 7-6(5)	Hard
2017-02-27	Acapulco	R32	Ernesto Escobedo	Stefan Kozlov	6-1 2-6 6-0	Hard
2017-02-27	Acapulco	Q2	Stefan Kozlov	Jared Donaldson	7-5 6-3	Hard
2017-02-27	Acapulco	Q1	Stefan Kozlov	Hyeon Chung	6-2 6-2	Hard
2017-02-20	Delray Beach	R32	Steve Johnson	Stefan Kozlov	6-1 6-4	Hard
2017-02-13	Tempe CH	QF	Teymuraz Gabashvili	Stefan Kozlov	6-3 6-1	Hard
2017-02-13	Tempe CH	R16	Stefan Kozlov	Roberto Quiroz	6-4 7-6(5)	Hard
2017-02-13	Tempe CH	R32	Stefan Kozlov	Bradley Klahn	6-1 7-5	Hard
2017-01-16	Australian Open	Q1	Yuki Bhambri	Stefan Kozlov	6-1 6-4	Hard
2017-01-02	Brisbane	Q1	John Patrick Smith	Stefan Kozlov	6-2 6-3	Hard
2016-11-21	Columbus CH	F	Stefan Kozlov	Tennys Sandgren	6-1 2-6 6-2	Hard
2016-11-21	Columbus CH	SF	Stefan Kozlov	Sam Barry	7-5 7-6(6)	Hard
2016-11-21	Columbus CH	QF	Stefan Kozlov	Kevin King	6-2 7-5	Hard
2016-11-21	Columbus CH	R16	Stefan Kozlov	Dominik Koepfer	6-3 6-4	Hard
2016-11-21	Columbus CH	R32	Stefan Kozlov	Jose Rubin Statham	6-2 7-6(6)	Hard
2016-11-14	Champaign CH	R16	Michael Mmoh	Stefan Kozlov	6-1 6-4	Hard
2016-11-14	Champaign CH	R32	Stefan Kozlov	Austin Krajicek	6-4 7-6(3)	Hard
2016-11-07	Knoxville CH	SF	Michael Mmoh	Stefan Kozlov	6-0 6-3	Hard
2016-11-07	Knoxville CH	QF	Stefan Kozlov	Edward Corrie	6-4 6-3	Hard
2016-11-07	Knoxville CH	R16	Stefan Kozlov	Tennys Sandgren	6-2 6-4	Hard
2016-11-07	Knoxville CH	R32	Stefan Kozlov	Sam Barry	6-4 7-5	Hard
2016-10-24	Suzhou CH	F	Yen Hsun Lu	Stefan Kozlov	6-0 6-1	Hard
2016-10-24	Suzhou CH	SF	Stefan Kozlov	Alexander Kudryavtsev	6-3 0-1 RET	Hard
2016-10-24	Suzhou CH	QF	Stefan Kozlov	Sergiy Stakhovsky	3-6 6-2 7-5	Hard
2016-10-24	Suzhou CH	R16	Stefan Kozlov	Cheong Eui Kim	6-4 6-3	Hard
2016-10-24	Suzhou CH	R32	Stefan Kozlov	Yecong He	5-7 6-0 6-4	Hard
2016-10-17	Ningbo CH	QF	Yen Hsun Lu	Stefan Kozlov	3-6 6-4 6-4	Hard
2016-10-17	Ningbo CH	R16	Stefan Kozlov	Di Wu	7-6(4) 6-3	Hard
2016-10-17	Ningbo CH	R32	Stefan Kozlov	Jimmy Wang	6-2 6-4	Hard
2016-10-10	Ho Chi Minh CH	R32	Taro Daniel	Stefan Kozlov	6-4 6-3	Hard
2016-09-26	Tiburon CH	R16	Michael Mmoh	Stefan Kozlov	7-5 6-4	Hard
2016-09-26	Tiburon CH	R32	Stefan Kozlov	Guilherme Clezar	6-2 6-2	Hard
2016-09-12	Cary CH	QF	Ernesto Escobedo	Stefan Kozlov	3-6 6-1 6-2	Hard
2016-09-12	Cary CH	R16	Stefan Kozlov	Philip Bester	6-4 6-1	Hard
2016-09-12	Cary CH	R32	Stefan Kozlov	Erik Crepaldi	3-6 6-4 6-2	Hard
2016-08-29	US Open	Q1	Michael Berrer	Stefan Kozlov	2-6 7-6(5) 6-2	Hard
2016-08-15	Cincinnati Masters	Q2	Malek Jaziri	Stefan Kozlov	6-4 6-2	Hard
2016-08-15	Cincinnati Masters	Q1	Stefan Kozlov	Damir Dzumhur	6-4 3-6 7-5	Hard
2016-08-08	Aptos CH	R32	Mackenzie Mcdonald	Stefan Kozlov	6-1 6-4	Hard
2016-07-25	Lexington CH	R16	Alex Kuznetsov	Stefan Kozlov	3-6 6-3 6-4	Hard
2016-07-25	Lexington CH	R32	Stefan Kozlov	Andrey Golubev	6-2 6-2	Hard

Aliases

atp

S. Kozlov
Stefan Kozlov (ke64)

atp_short

S. Kozlov (ke64)

itf

Stefan Kozlov (800335858)

sackmann

Stefan Kozlov (111578)

variant

S Kozlov