Stefan Kozlov
| Challenger - Charlottesville | 11/07 18:00 | 29 | [224] Stefan Kozlov v Aleksandar Vukic [190] | 6-2,6-3 | |
| Challenger - Charlottesville | 11/06 17:35 | 28 | [224] Stefan Kozlov v Jeffrey John Wolf [159] | 6-1,6-7,6-0 | |
| Challenger - Charlottesville | 11/05 17:55 | 27 | [349] Emilio Nava v Stefan Kozlov [224] | 4-6,2-6 | |
| Challenger - Charlottesville | 11/03 23:55 | 26 | [213] Jason Kubler v Stefan Kozlov [224] | 3-6,1-6 | |
| Challenger - Charlottesville | 11/03 01:35 | 25 | [224] Stefan Kozlov v Bjorn Fratangelo [172] | 7-5,6-2 | |
| Challenger - Las Vegas | 10/31 19:00 | 29 | [247] Stefan Kozlov v Jeffrey John Wolf [195] | 4-6,4-6 | |
| Challenger - Las Vegas | 10/30 21:50 | 28 | [247] Stefan Kozlov v Aleksandar Kovacevic [352] | 6-2,6-4 | |
| Challenger - Las Vegas | 10/29 19:35 | 27 | [247] Stefan Kozlov v Emilio Gomez [149] | 7-6,6-4 | |
| Challenger - Las Vegas | 10/28 19:35 | 26 | [374] Aidan Mchugh v Stefan Kozlov [247] | 2-6,7-5,6-7 | |
| Challenger - Las Vegas | 10/26 20:20 | 25 | [392] Sasikumar Mukund v Stefan Kozlov [247] | 2-6,4-6 | |
| ATP - Indian Wells | 10/06 18:00 | 19 | [253] Stefan Kozlov v Christopher Eubanks [194] | 6-2,0-6,5-7 | |
| ATP - Indian Wells | 10/05 19:25 | 14 | [165] Jason Jung v Stefan Kozlov [253] | Retired | |
| Challenger - Columbus | 09/26 16:55 | 29 | [301] Stefan Kozlov v Max Purcell [189] | 4-6,6-2,6-4 | |
| Challenger - Columbus | 09/25 16:00 | 28 | [196] Jeffrey John Wolf v Stefan Kozlov [301] | 6-2,3-6,5-7 | |
| Challenger - Columbus | 09/24 15:00 | 27 | [226] Mikael Torpegaard v Stefan Kozlov [301] | 6-2,6-7,4-6 | |
| Challenger - Columbus | 09/23 15:00 | 26 | [219] Jason Kubler v Stefan Kozlov [301] | 2-6,5-7 | |
| Challenger - Columbus | 09/21 19:45 | 25 | [301] Stefan Kozlov v Mitchell Krueger [156] | 6-0,6-3 | |
| Challenger - Cary | 09/14 15:00 | 25 | [301] Stefan Kozlov v Zachary Svajda [476] | Retired | |
| Challenger - Kyjev | 09/06 12:00 | 25 | [291] Franco Agamenone v Stefan Kozlov [312] | 6-4,7-5 | |
| Challenger - Mallorca | 09/02 16:25 | 26 | [312] Stefan Kozlov v Fernando Verdasco [132] | 6-1,6-7,2-6 | |
| Challenger - Mallorca | 08/31 12:55 | 25 | Daniel Rincon v Stefan Kozlov | 3-6,6-1,1-6 | |
| US Open | 08/24 15:00 | 14 | [117] Bernabe Zapata Miralles v Stefan Kozlov [309] | 7-5,1-6,6-3 | |
| Challenger - Lexington | 07/29 20:00 | 26 | [322] Stefan Kozlov v Alejandro Tabilo [174] | 2-6,2-6 | |
| Challenger - Lexington | 07/27 22:30 | 25 | [217] Christopher Eubanks v Stefan Kozlov [322] | 6-7,6-7 | |
| Challenger - Lexington | 07/26 20:55 | 19 | [322] Stefan Kozlov v Edan Leshem [418] | 3-6,7-6,6-1 | |
| Challenger - Lexington | 07/25 20:30 | 14 | Stefan Kozlov v Sam Riffice | 6-2,6-3 | |
| Challenger - Cary | 07/24 21:25 | 28 | [344] Stefan Kozlov v Ramkumar Ramanathan [227] | 6-1,3-6,1-6 | |
| Challenger - Cary | 07/23 23:00 | 27 | [220] Christopher Eubanks v Stefan Kozlov [344] | 7-5,1-6,3-6 | |
| Challenger - Cary | 07/21 18:45 | 26 | [344] Stefan Kozlov v Maxime Cressy [149] | 3-6,6-3,6-4 | |
| Challenger - Cary | 07/19 23:00 | 25 | [344] Stefan Kozlov v Donald Young [365] | 4-6,6-4,6-4 |
Wikipedia - Stefan Kozlov
Stefan Kozlov (Russian: Стефан Козлов, STEF-ahn KOZ-lov; born February 1, 1998) is an American professional tennis player of Russian descent. He has a career-high ATP ranking of world No. 103 achieved on 18 July 2022 and doubles ranking of world No. 180 on 19 June 2017.
Kozlov made his ATP World Tour debut as a wildcard in 2013 Hall of Fame Tennis Championships at the age of 15. He reached two junior Grand Slam finals in 2014 and finished the year at World No. 3 in the ITF Junior Combined rankings.