Name: Stefan Kozlov
Country: USA
Birthdate: 01.02.98, 26 years
ATP ranking: 515
TOP ranking's position: 103 (18.07.22, 533 points)
Points: 75
Prize money: 996.773 $
Matches total: 575
Win: 327
%: 56.87 %
Country: USA
Birthdate: 01.02.98, 26 years
ATP ranking: 515
TOP ranking's position: 103 (18.07.22, 533 points)
Points: 75
Prize money: 996.773 $
Matches total: 575
Win: 327
%: 56.87 %
| year | summary | Hard | Clay | I. hard | Carpet | Grass | Acrylic |
| 2024 | 23/10 | 4/3 | 16/6 | 3/1 | 0/0 | 0/0 | 0/0 |
| 2023 | 6/12 | 1/6 | 0/0 | 5/6 | 0/0 | 0/0 | 0/0 |
| 2022 | 21/34 | 14/18 | 0/5 | 4/5 | 0/0 | 3/6 | 0/0 |
| 2021 | 41/15 | 20/12 | 5/2 | 16/1 | 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 | 327/248 | 152/126 | 76/52 | 75/44 | 0/0 | 24/26 | 0/0 |
| perc. % | 56.87 % | 54.68 % | 59.38 % | 63.03 % | 0 % | 48 % | 0 % |
Stefan Kozlov / Fixtures
| 19.04.24 | 1/4 | Oliver Crawford | Stefan Kozlov | match details |  Tallahassee Challenger | Clay |
Stefan Kozlov form / year 2014 / surface: Clay
Stefan Kozlov / year 2014 / surface: Clay
| 05.06.14 | 1/4 | Andrey Rublev | Stefan Kozlov | 7-5, 3-6, 6-4 |  | match details |  French Open | Clay |
| 04.06.14 | 3rd round | Stefan Kozlov | Duckhee Lee | 7-64, 6-1 |  | match details | ||
| 03.06.14 | 2nd round | Stefan Kozlov | Akira Santillan | 6-3, 6-3 | | match details | ||
| 01.06.14 | 1st round | Stefan Kozlov | Ryotaro Matsumura | 6-4, 6-2 | | match details | ||
| 19.05.14 | 2nd round | Juan Lizariturry | Stefan Kozlov | 6-2, 5-7, 6-4 | | match details |  Spain F10 | Clay |
| 19.05.14 | 1st round | Stefan Kozlov | Sergio Martos Gornes | 6-2, 6-3 | | match details | ||
| 28.04.14 | 2nd round | Facundo Mena | Stefan Kozlov | 3-6, 6-3, 6-2 | | match details | USA F12 | Clay |
| 28.04.14 | 1st round | Stefan Kozlov | Devin Mccarthy | 6-1, 2-0, Devin Mccarthy - retired | | match details | ||
| 20.04.14 | q 1 | Eric Quigley | Stefan Kozlov | 4-6, 7-5, 6-3 | | match details | Savannah Challenger | Clay |
