Nombre: Stefan Kozlov
País: USA
Fecha de nacimiento: 01.02.98, 28 años
ATP ranking: 292
TOP posición de la clasificación: 103 (18.07.22, 533 puntos)
Puntos: 181
Dinero del premio: 1079127 $
Partidos totales: 671
ganar: 386
%: 57.53 %
País: USA
Fecha de nacimiento: 01.02.98, 28 años
ATP ranking: 292
TOP posición de la clasificación: 103 (18.07.22, 533 puntos)
Puntos: 181
Dinero del premio: 1079127 $
Partidos totales: 671
ganar: 386
%: 57.53 %
| año | resumen | Difícil | Arcilla | I. difícil | Alfombra | Césped | Acrílico |
| 2026 | 17/15 | 5/6 | 5/5 | 7/4 | 0/0 | 0/0 | 0/0 |
| 2025 | 28/12 | 12/6 | 6/2 | 10/3 | 0/0 | 0/1 | 0/0 |
| 2024 | 37/20 | 16/9 | 17/8 | 4/3 | 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 | 386/285 | 181/144 | 88/61 | 93/53 | 0/0 | 24/27 | 0/0 |
| porc. % | 57.53 % | 55.69 % | 59.06 % | 63.7 % | 0 % | 47.06 % | 0 % |
Stefan Kozlov / programado / pasado
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Stefan Kozlov form
Stefan Kozlov / últimos 50 partidos
| 12.05.26 | calif. | Alejo Sanchez Quilez | Stefan Kozlov | 7-5, 6-4 |  | match details |  Valencia Challenger | Arcilla |
| 11.05.26 | c 1 | Stefan Kozlov | Mario Mansilla Diez | 6-2, 6-1 |  | match details | ||
| 22.04.26 | 2da ronda | Nick Hardt | Stefan Kozlov | 6-2, 2-6, 6-0 | | match details |  Savannah Challenger | Arcilla |
| 20.04.26 | 1er ronda | Stefan Kozlov | Daniil Glinka | 6-2, 6-3 | | match details | ||
| 14.04.26 | 1er ronda | Alex Rybakov | Stefan Kozlov | 7-63, 6-2 | | match details | Tallahassee Challenger | Arcilla |
| 13.04.26 | calif. | Stefan Kozlov | Kilian Feldbausch | 6-1, 4-6, 7-62 | | match details | ||
| 12.04.26 | c 1 | Stefan Kozlov | Strong Kirchheimer | 6-0, 6-4 | | match details | ||
| 08.04.26 | 2da ronda | James Duckworth | Stefan Kozlov | 6-3, 6-2 | | match details |  Mexico City | Arcilla |
| 06.04.26 | 1er ronda | Stefan Kozlov | Raphael Perot | 6-3, 6-1 | | match details | ||
| 31.03.26 | 1er ronda | Alan Magadan | Stefan Kozlov | 6-3, 7-67 | | match details | San Luis | Arcilla |
| 24.03.26 | 1er ronda | Andres Martin | Stefan Kozlov | 6-2, 6-2 | | match details | Morelia Challenger | Difícil |
| 19.03.26 | 2da ronda | Michael Mmoh | Stefan Kozlov | 7-5, 6-2 | | match details | Morelos Challenger | Difícil |
| 17.03.26 | 1er ronda | Stefan Kozlov | Alan Magadan | 6-4, 6-4 | | match details | ||
| 11.03.26 | 1er ronda | Jay Dylan Hara Friend | Stefan Kozlov | 6-2, 4-6, 6-3 | | match details | Phoenix Challenger | Difícil |
| 10.03.26 | calif. | Stefan Kozlov | Marc Polmans | 6-1, 3-6, 6-4 | | match details | ||
| 09.03.26 | c 1 | Stefan Kozlov | Nathan Ponwith | 7-5, 6-4 | | match details | ||
| 21.02.26 | c 1 | Patrick Kypson | Stefan Kozlov | 7-63, 6-0 | | match details | Acapulco | Difícil |
| 20.02.26 | 1/4 | Rodrigo Pacheco Mendez | Stefan Kozlov | 6-4, 6-2 | | match details | Metepec Challenger | Difícil |
| 18.02.26 | 2da ronda | Stefan Kozlov | Karl Poling | 6-4, 7-64 | | match details | ||
| 16.02.26 | 1er ronda | Stefan Kozlov | Tristan Mccormick | 6-3, 6-74, 6-4 | | match details | ||
| 06.02.26 | 1/4 | Keegan Smith | Stefan Kozlov | 6-3, 6-2 | | match details | Cleveland Challenger | I. difícil |
| 04.02.26 | 2da ronda | Stefan Kozlov | Raphael Perot | 7-65, 3-6, 6-3 | | match details | ||
| 02.02.26 | 1er ronda | Stefan Kozlov | Cedrik-Marcel Stebe | 3-6, 6-2, 6-3 | | match details | ||
| 28.01.26 | 1er ronda | Sho Shimabukuro | Stefan Kozlov | 6-2, 4-6, 7-65 | | match details | San Diego | Difícil |
| 22.01.26 | 2da ronda | Francesco Passaro | Stefan Kozlov | 6-3, 1-6, 6-1 | | match details |  Oeiras 1 | I. difícil |
| 20.01.26 | 1er ronda | Stefan Kozlov | Alexis Galarneau | 7-62, 2-6, 6-1 | | match details | ||
| 19.01.26 | calif. | Stefan Kozlov | Mikhail Kukushkin | 6-4, 6-2 | | match details | ||
| 18.01.26 | c 1 | Stefan Kozlov | Robert Strombachs | 6-3, 5-0, Robert Strombachs - retirado | | match details | ||
| 13.01.26 | 1er ronda | Harry Wendelken | Stefan Kozlov | 6-1, 3-6, 6-4 | | match details |  Glasgow Challenger | I. difícil |
| 08.01.26 | 1/4 | Toby Samuel | Stefan Kozlov | 7-61, 6-4 | | match details | Nottingham 1 | I. difícil |
| 07.01.26 | 2da ronda | Stefan Kozlov | Mathys Erhard | 6-2, 6-4 | | match details | ||
| 06.01.26 | 1er ronda | Stefan Kozlov | Tyler Zink | 6-4, 6-1 | | match details | ||
| 28.11.25 | 1/4 | Juan Sebastian Gomez | Stefan Kozlov | 4-6, 6-4, 7-5 | | match details |  Bogota Challenger | Arcilla |
| 27.11.25 | 2da ronda | Stefan Kozlov | David Jorda Sanchis | 6-4, 6-4 | | match details | ||
| 25.11.25 | 1er ronda | Stefan Kozlov | Juan Bautista Torres | 6-0, 4-6, 6-3 | | match details | ||
| 16.11.25 | fin | Stefan Kozlov | Murphy Cassone | 7-63, 7-5 | | match details | Champaign Challenger | I. difícil |
| 15.11.25 | 1/2 | Stefan Kozlov | Cedrik-Marcel Stebe | 6-0, 4-0, Cedrik-Marcel Stebe - retirado | | match details | ||
| 14.11.25 | 1/4 | Stefan Kozlov | Darwin Blanch | 6-2, 6-77, 6-3 | | match details | ||
| 13.11.25 | 2da ronda | Stefan Kozlov | Tyler Zink | 6-3, 6-3 | | match details | ||
| 11.11.25 | 1er ronda | Stefan Kozlov | Leo Borg | 6-1, 6-0 | | match details | ||
| 05.11.25 | 2da ronda | Jay Clarke | Stefan Kozlov | 6-2, 2-6, 6-3 | | match details | Knoxville Challenger | I. difícil |
| 03.11.25 | 1er ronda | Stefan Kozlov | Dominique Rolland | 7-61, 2-6, 6-1 | | match details | ||
| 04.08.25 | calif. | Tsung-Hao Huang | Stefan Kozlov | 1-6, 7-5, 6-2 | | match details | Chicago Challenger | Difícil |
| 03.08.25 | c 1 | Stefan Kozlov | Ramkumar Ramanathan | 6-1, 6-74, 5-3, Ramkumar Ramanathan - retirado | | match details | ||
| 07.07.25 | 1er ronda | Mitchell Krueger | Stefan Kozlov | 6-1, 3-6, 6-1 | | match details | Newport Challenger | Césped |
| 02.06.25 | calif. | Alvin Nicholas Tudorica | Stefan Kozlov | 7-5, 6-3 | | match details | Tyler Challenger | Difícil |
| 01.06.25 | c 1 | Stefan Kozlov | Daniel Milavsky | 6-3, 6-77, 6-3 | | match details | ||
| 29.05.25 | 2da ronda | Andres Andrade | Stefan Kozlov | 6-1, 4-6, 7-5 | | match details | Little Rock | Difícil |
| 28.05.25 | 1er ronda | Stefan Kozlov | Aziz Dougaz | 5-7, 6-3, 6-2 | | match details | ||
| 28.05.25 | calif. | Stefan Kozlov | Elmar Ejupovic | 6-4, 7-65 | | match details |