Challenger - Knoxville | 11/09 22:20 | 26 | [382] Prajnesh Gunneswaran v Stefan Kozlov [159] | 4-6,3-6 | |
Challenger - Knoxville | 11/07 20:30 | 25 | [460] Martin Damm v Stefan Kozlov [159] | 7-6,3-6,2-6 | |
Challenger - Charlottesville | 11/03 19:20 | 26 | [328] Lucas Gerch v Stefan Kozlov [132] | 6-4,7-6 | |
Challenger - Charlottesville | 11/01 21:50 | 25 | [199] Mitchell Krueger v Stefan Kozlov [132] | 5-7,6-0,6-7 | |
Challenger - Las Vegas | 10/30 19:00 | 29 | [444] Tennys Sandgren v Stefan Kozlov [133] | 7-5,6-3 | |
Challenger - Las Vegas | 10/29 19:55 | 28 | [133] Stefan Kozlov v Steve Johnson [119] | 6-3,1-6,7-5 | |
Challenger - Las Vegas | 10/28 19:10 | 27 | [225] Alexis Galarneau v Stefan Kozlov [133] | 7-6,4-6,3-6 | |
Challenger - Las Vegas | 10/27 18:00 | 26 | [321] Evan Zhu v Stefan Kozlov [133] | 6-7,2-6 | |
Challenger - Las Vegas | 10/25 19:40 | 25 | Cannon Kingsley v Stefan Kozlov | 5-7,6-4,1-6 | |
Challenger - Fairfield | 10/11 18:20 | 25 | Sam Riffice v Stefan Kozlov | 3-6,6-2,6-3 | |
Challenger - Tiburon | 10/06 19:35 | 26 | [243] Alexis Galarneau v Stefan Kozlov [130] | 6-1,7-5 | |
Challenger - Tiburon | 10/04 19:45 | 25 | [361] Giovanni Oradini v Stefan Kozlov [130] | 1-6,4-6 | |
Challenger - Charleston | 09/27 14:00 | 25 | Evan Zhu v Stefan Kozlov | Cancelled | |
ATP - San Diego | 09/20 00:30 | 25 | [73] Jeffrey John Wolf v Stefan Kozlov [108] | 6-2,7-6 | |
Challenger Cary | 09/15 20:00 | 26 | [307] Yasutaka Uchiyama v Stefan Kozlov [110] | Retired | |
Challenger Cary | 09/13 18:00 | 25 | Cannon Kingsley v Stefan Kozlov | 6-2,2-6,2-6 | |
Open dos EUA | 08/29 16:00 | 23 | [1] Daniil Medvedev v Stefan Kozlov [111] | 6-2,6-4,6-0 | |
Challenger - Granby | 08/23 14:00 | 25 | Stefan Kozlov v Aidan Mchugh | Cancelled | |
ATP - Cincinnati | 08/13 20:15 | 14 | [113] Stefan Kozlov v Dusan Lajovic [68] | 3-6,5-7 | |
Challenger - Chicago | 08/10 18:50 | 25 | [113] Stefan Kozlov v Ernesto Escobedo [174] | 4-6,6-7 | |
ATP - Washington | 08/01 21:20 | 24 | [111] Stefan Kozlov v Jack Draper [81] | 5-7,2-6 | |
ATP - Atlanta | 07/23 18:00 | 26 | [196] Ramkumar Ramanathan v Stefan Kozlov [103] | 6-0,6-1 | |
Challenger - Indianapolis | 07/18 22:45 | 25 | [269] Aleksandar Kovacevic v Stefan Kozlov [103] | 6-3,6-7,6-4 | |
ATP - Newport | 07/11 18:40 | 25 | [104] Stefan Kozlov v Steve Johnson [95] | 5-7,3-6 | |
Wimbledon | 06/28 15:40 | 23 | [107] Stefan Kozlov v Diego Schwartzman [15] | 3-6,2-6,2-6 | |
Wimbledon | 06/23 10:00 | 19 | [107] Stefan Kozlov v Dennis Novak [155] | 5-7,4-6,7-5,6-3,3-6 | |
Wimbledon | 06/22 10:00 | 19 | [107] Stefan Kozlov v Dominic Stephan Stricker [188] | 7-6,4-6,6-3 | |
Wimbledon | 06/20 12:15 | 14 | [107] Stefan Kozlov v Evan Furness [229] | 7-5,6-3 | |
ATP - Queens | 06/11 11:20 | 26 | [111] Stefan Kozlov v Steve Johnson [87] | 0-6,0-6 | |
ATP - Hertogenbosch | 06/04 11:00 | 14 | [112] Stefan Kozlov v Matthew Ebden [395] | 4-6,4-6 |
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.