Name: Stefan Kozlov
Country: USA
Birthdate: 01.02.98, 23 years
ATP ranking: 344
TOP ranking's position: 115 (27.02.17, 496 points)
Points: 133
Prize money: 509.657 $
Matches total: 435
Win: 252
%: 57.93 %
Country: USA
Birthdate: 01.02.98, 23 years
ATP ranking: 344
TOP ranking's position: 115 (27.02.17, 496 points)
Points: 133
Prize money: 509.657 $
Matches total: 435
Win: 252
%: 57.93 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2021 | 16/6 | 11/5 | 5/1 | 0/0 | 0/0 | 0/0 | 0/0 |
| 2020 | 13/13 | 7/8 | 0/0 | 6/5 | 0/0 | 0/0 | 0/0 |
| 2019 | 22/18 | 14/9 | 4/4 | 4/5 | 0/0 | 0/0 | 0/0 |
| 2018 | 13/26 | 4/12 | 7/6 | 1/4 | 0/0 | 1/4 | 0/0 |
| 2017 | 31/29 | 15/14 | 8/8 | 3/2 | 0/0 | 5/5 | 0/0 |
| 2016 | 58/31 | 28/15 | 10/6 | 16/5 | 0/0 | 4/5 | 0/0 |
| 2015 | 44/27 | 15/12 | 10/5 | 17/8 | 0/0 | 2/2 | 0/0 |
| 2014 | 33/19 | 23/12 | 5/4 | 0/2 | 0/0 | 5/1 | 0/0 |
| 2013 | 17/11 | 3/3 | 11/6 | 0/0 | 0/0 | 3/2 | 0/0 |
| 2012 | 5/3 | 4/2 | 0/0 | 0/0 | 0/0 | 1/1 | 0/0 |
| TOTAL | 252/183 | 124/92 | 60/40 | 47/31 | 0/0 | 21/20 | 0/0 |
| perc. % | 57.93 % | 57.41 % | 60 % | 60.26 % | 0 % | 51.22 % | 0 % |
Stefan Kozlov / Fixtures
| 24.07.21 00:00 | 1/4 | Stefan Kozlov | Christopher Eubanks | 5-7, 6-1, 6-3 | match details |  Cary Challenger | Hard |
Stefan Kozlov form
Stefan Kozlov / Latest Scores
| 23.07.21 | 1/4 | Stefan Kozlov | Christopher Eubanks | 5-7, 6-1, 6-3 |  | match details | Cary Challenger | Hard |
| 21.07.21 | 2nd round | Stefan Kozlov | Maxime Cressy | 3-6, 6-3, 6-4 | | match details | ||
| 19.07.21 | 1st round | Stefan Kozlov | Donald Young | 4-6, 6-4, 6-4 | | match details | ||
| 04.07.21 | 1/2 | Stefan Kozlov | Ryan Harrison | 5-7, 6-3, 6-3 | | match details | M15 Weston | Clay |
| 03.07.21 | 1/4 | Stefan Kozlov | Christian Langmo | 6-2, 7-5 | | match details | ||
| 03.07.21 | 2nd round | Stefan Kozlov | Ben Shelton | 7-5, 6-1 | | match details | ||
| 01.07.21 | 1st round | Stefan Kozlov | Evan Zhu | 6-3, 3-6, 6-1 | | match details | ||
| 16.06.21 | 1st round | Michail Pervolarakis | Stefan Kozlov | 7-64, 6-4 |  | match details | M25 Tulsa | Hard |
| 08.06.21 | 1st round | Thiago Agustin Tirante | Stefan Kozlov | 6-3, 6-1 | | match details | Orlando 2 | Hard |
| 07.06.21 | qual. | Stefan Kozlov | Adrian Andreev | 4-6, 6-4, 6-4 | | match details | ||
| 06.06.21 | q 1 | Stefan Kozlov | Robert Galloway | 6-4, 7-64 | | match details | ||
| 02.06.21 | 1st round | Thai Kwiatkowski | Stefan Kozlov | 6-2, 6-1 | | match details | Little Rock | Hard |
| 31.05.21 | qual. | Stefan Kozlov | Strong Kirchheimer | 6-3, 6-2 | | match details | ||
| 30.05.21 | q 1 | Stefan Kozlov | Brian Battistone | 6-2, 6-2 | | match details | ||
| 16.03.21 | 1st round | Cameron Norrie | Stefan Kozlov | 6-3, 6-3 | | match details |  Acapulco | Hard |
| 15.03.21 | qual. | Stefan Kozlov | Botic Van De Zandschulp | 6-3, 1-0, Botic Van De Zandschulp - retired | | match details | ||
| 14.03.21 | q 2 | Stefan Kozlov | Joao Sousa | 6-2, 2-6, 6-3 | | match details | ||
| 13.03.21 | q 1 | Stefan Kozlov | Jordi Arconada | 6-4, 6-1 | | match details | ||
| 18.02.21 | 2nd round | Mitchell Krueger | Stefan Kozlov | 6-4, 3-0, Stefan Kozlov - retired | | match details | M25 Naples | Clay |
| 17.02.21 | 1st round | Stefan Kozlov | Gonzalo Villanueva | 6-3, 6-2 | | match details | ||
| 06.01.21 | qual. | Donald Young | Stefan Kozlov | 4-6, 6-4, 6-4 | | match details | Delray Beach | Hard |
| 05.01.21 | q 1 | Stefan Kozlov | Johannes Haerteis | 5-0, Johannes Haerteis - retired | | match details | ||
| 17.11.20 | 1st round | Thiago Moura Monteiro | Stefan Kozlov | 6-1, 6-3 | | match details | Orlando Challenger | Hard |
| 15.11.20 | qual. | Stefan Kozlov | Kevin King | 7-61, 6-77, 6-4 | | match details | ||
| 14.11.20 | q 1 | Stefan Kozlov | Martin Damm | 6-4, 6-72, 6-4 | | match details | ||
| 07.11.20 | q 1 | Nicolas Mejia | Stefan Kozlov | 2-6, 7-5, 7-62 | | match details | Cary Challenger | Hard |
| 22.10.20 | 1/4 | Raul Brancaccio | Stefan Kozlov | 6-4, 7-5 | | match details |  M25 Hamburg | I. hard |
| 21.10.20 | 2nd round | Stefan Kozlov | Henri Squire | 6-4, 6-1 | | match details | ||
| 19.10.20 | 1st round | Stefan Kozlov | Stefano Napolitano | 6-4, 6-2 | | match details | ||
| 14.10.20 | 1st round | Jurgen Briand | Stefan Kozlov | 6-4, 6-2 | | match details |  M25+H Rodez | I. hard |
| 04.10.20 | 1/2 | Nuno Borges | Stefan Kozlov | 6-3, 7-5 | | match details |  M25 Porto | Hard |
| 03.10.20 | 1/4 | Stefan Kozlov | Dayne Kelly | 6-2, 6-2 | | match details | ||
| 01.10.20 | 2nd round | Stefan Kozlov | Adrian Menendez-Maceiras | 7-5, 6-3 | | match details | ||
| 30.09.20 | 1st round | Stefan Kozlov | Michail Pervolarakis | 6-1, 6-4 | | match details | ||
| 24.09.20 | 1st round | Stefan Kozlov | Alexis Musialek | 7-5, 6-0 | | match details | M15 Castelo | Hard |
| 24.09.20 | 2nd round | Nicolas Moreno De Alboran | Stefan Kozlov | 6-3, 6-4 | | match details | ||
| 16.09.20 | 1st round | Daniel Cukierman | Stefan Kozlov | 1-6, 6-3, 6-1 | | match details | M25+H Plaisir | I. hard |
| 09.09.20 | 1st round | Robert Strombachs | Stefan Kozlov | 6-4, 6-2 | | match details | M15 Sintra | Hard |
| 18.02.20 | 1st round | Ugo Humbert | Stefan Kozlov | 6-75, 6-3, 6-1 | | match details | Delray Beach | Hard |
| 16.02.20 | qual. | Emilio Gomez | Stefan Kozlov | 6-3, 6-2 | | match details | ||
| 15.02.20 | q 1 | Stefan Kozlov | Alex Bolt | 4-6, 6-4, 6-2 | | match details | ||
| 04.02.20 | 1st round | Donald Young | Stefan Kozlov | 6-2, 6-2 | | match details | Dallas Challenger | I. hard |
| 23.01.20 | 1st round | Maximiliano Estevez | Stefan Kozlov | 5-7, 1-1, Stefan Kozlov - retired | | match details | M15 Cancun | Hard |
| 11.01.20 | 1/2 | Roberto Cid Subervi | Stefan Kozlov | 7-61, 5-7, 6-3 | | match details | Ann Arbor | I. hard |
| 10.01.20 | 1/4 | Stefan Kozlov | Bjorn Fratangelo | 7-64, 6-2 | | match details | ||
| 09.01.20 | 3rd round | Stefan Kozlov | Brandon Nakashima | 4-6, 6-3, 6-2 | | match details | ||
| 07.01.20 | 2nd round | Stefan Kozlov | Renzo Olivo | 7-62, 6-2 | | match details | ||
| 06.01.20 | 1st round | Stefan Kozlov | Arthur Rinderknech | 6-3, 6-4 | | match details | ||
| 15.11.19 | 1/4 | Jeff Wolf | Stefan Kozlov | 6-2, 6-2 | | match details | Champaign Challenger | I. hard |
| 14.11.19 | 3rd round | Stefan Kozlov | Evan Song | 6-4, 4-6, 6-1 | | match details |
