Challenger Las Vegas | 10/17 18:00 | 26 | Stefan Kozlov v Alexander Ritschard | 5-7,6-4,6-1 | |
Challenger Las Vegas | 10/15 20:55 | 25 | Blaz Rola v Stefan Kozlov | 4-6,3-6 | |
Challenger Las Vegas | 10/14 23:15 | 24 | Stefan Kozlov v Evan Song | 6-4,6-3 | |
US Open | 08/20 16:15 | 44 | Stefan Kozlov v Egor Gerasimov | 4-6,4-6 | |
Challenger Binghamton | 07/23 20:45 | 24 | [274] Roberto Ortega-Olmedo v Stefan Kozlov [402] | Retired | |
Challenger Winnetka | 07/11 19:15 | 26 | [406] Stefan Kozlov v Jason Kubler [188] | 2-6,3-6 | |
Challenger Winnetka | 07/09 16:40 | 25 | [146] Adrian Menendez-Maceiras v Stefan Kozlov [406] | Retired | |
Challenger Winnetka | 07/08 19:55 | 24 | [406] Stefan Kozlov v Evgeny Karlovskiy [216] | 6-2,6-4 | |
Challenger Little Rock | 06/05 18:00 | 25 | [406] Stefan Kozlov v Zhe Li [239] | 3-6,7-5,0-6 | |
Challenger Little Rock | 06/04 17:10 | 24 | Stefan Kozlov v Garrett Johns | 7-5,6-3 | |
Challenger - Savannah | 04/29 19:30 | 24 | [354] Aleksandar Vukic v Stefan Kozlov [366] | 6-2,7-6 | |
Challenger Tallahassee | 04/24 23:40 | 25 | [374] Stefan Kozlov v Tennys Sandgren [103] | 3-6,2-6 | |
Challenger Tallahassee | 04/22 15:30 | 24 | Stefan Kozlov v Alexander Zhurbin | 4-6,6-4,6-0 | |
ITF - Sunrise M15 | 04/11 17:30 | 26 | Stefan Kozlov v Dmitry Popko | 5-7,3-6 | |
ITF - Sunrise M15 | 04/10 18:50 | 25 | Stefan Kozlov v Mateus D C C Alves | 6-3,6-1 | |
ITF - Calabasas M25 | 03/24 20:00 | 29 | [492] Alexander Ritschard v Stefan Kozlov [339] | 6-2,0-6,7-6 | |
ITF - Calabasas M25 | 03/23 20:40 | 28 | Drew Baird v Stefan Kozlov | 2-6,2-6 | |
ITF - Calabasas M25 | 03/22 20:00 | 27 | Jonathan Gray v Stefan Kozlov | 2-6,1-6 | |
ITF - Calabasas M25 | 03/21 23:25 | 26 | Isaiah Strode v Stefan Kozlov | 6-7,0-6 | |
ITF - Calabasas M25 | 03/19 20:30 | 25 | [464] Ronnie Schneider v Stefan Kozlov [339] | 2-6,0-6 | |
Challenger Drummondville | 03/11 14:35 | 24 | [435] Gijs Brouwer v Stefan Kozlov [340] | 7-5,6-3 | |
Challenger Morelos | 02/21 17:00 | 26 | [338] Stefan Kozlov v Roberto Quiroz [182] | 4-6,6-7 | |
Challenger Morelos | 02/19 20:35 | 25 | [310] Alexander Sarkissian v Stefan Kozlov [338] | Retired | |
Challenger Morelos | 02/18 16:00 | 24 | [319] Evan Song v Stefan Kozlov [338] | 5-7,3-6 | |
Challenger Dallas | 02/05 20:30 | 24 | [489] Alex Rybakov v Stefan Kozlov [333] | 6-2,6-1 | |
Challenger Cleveland | 01/30 16:25 | 25 | [164] Brayden Schnur v Stefan Kozlov [336] | 7-6,6-4 | |
Challenger Cleveland | 01/28 20:25 | 24 | [466] Louis Wessels v Stefan Kozlov [336] | 4-6,7-5,5-7 | |
Challenger Newport Beach | 01/21 18:00 | 166 | [311] Stefan Kozlov v Maxime Cressy [335] | 5-7,1-6 | |
Challenger Columbus | 01/07 19:00 | 24 | [366] Jeffrey John Wolf v Stefan Kozlov [309] | 6-2,7-6 | |
Challenger Orlando | 01/03 19:20 | 26 | [264] Nino Serdarusic v Stefan Kozlov [316] | 6-2,7-5 |
Stefan Kozlov (ur. 1 lutego 1998 w Skopju) – amerykański tenisista macedońskiego pochodzenia. Finalista juniorskich wielkoszlemowych turniejów Australian Open 2014 oraz Wimbledonu 2014 w grze pojedynczej, a także Wimbledonu 2014 w grze podwójnej.