Results
| Challenger Cleveland | 01/31 23:25 | 27 | [258] J.J. Wolf v Stefan Kozlov [354] | 6-1,6-3 | |
| Challenger Cleveland | 01/30 17:40 | 26 | Stefan Kozlov v Kaylan Bigun | 6-2,6-3 | |
| Challenger Cleveland | 01/28 21:15 | 25 | [439] Micah Braswell v Stefan Kozlov [354] | 6-4,3-6,4-6 | |
| Challenger Quimper | 01/22 11:00 | 25 |
[160] Elmer Moller
v
Stefan Kozlov [355] |
6-3,7-5 | |
| Challenger Quimper | 01/21 10:35 | 19 | [490] Loann Massard v Stefan Kozlov [355] | 6-4,2-6,4-6 | |
| Challenger Quimper | 01/20 13:20 | 14 |
[355] Stefan Kozlov v
Filip Misolic
[312] 
|
6-3,6-4 | |
| UTR Pro Baton Rouge | 01/12 17:00 | 29 | Stefan Kozlov v Raphael Perot | 6-2,6-1 | |
| UTR Pro Baton Rouge | 01/11 19:15 | 28 | Stefan Kozlov v William Nolan | 6-3,6-3 | |
| UTR Pro Baton Rouge | 01/09 17:00 | - | Stefan Kozlov v Andrej Loncarevic | 6-3,6-3 | |
| UTR Pro Baton Rouge | 01/08 20:35 | - | Stefan Kozlov v Evan Lee | 6-3,6-1 | |
| UTR Pro Baton Rouge | 01/07 19:05 | - | Stefan Kozlov v Bradley Paliska | 6-1,6-1 | |
| UTR Pro Baton Rouge | 01/06 17:00 | - | Stefan Kozlov v Parashar Bharadwaj | 7-5,6-3 |
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.