Home History
| ATP Delray Beach | 2021/01/06 16:00 | Donald Young v Stefan Kozlov | 4-6,6-4,6-4 |
| Challenger Orlando | 2020/11/17 18:30 | Thiago Monteiro v Stefan Kozlov | 6-1,6-3 |
| Challenger Orlando | 2020/11/15 17:30 | Kevin King v Stefan Kozlov | 6-7,7-6,4-6 |
| Challenger Orlando | 2020/11/14 17:45 | Martin Damm v Stefan Kozlov | 4-6,7-6,4-6 |
| Challenger Cary | 2020/11/07 17:00 | Nicolas Mejia v Stefan Kozlov | 2-6,7-5,7-6 |
| ITF M25 Hamburg | 2020/10/22 12:55 | Stefan Kozlov v Raul Brancaccio | 4-6,5-7 |
| ITF M25 Hamburg | 2020/10/21 10:40 | Stefan Kozlov v Henri Squire | 6-4,6-1 |
| ITF M25 Hamburg | 2020/10/19 14:50 | Stefano Napolitano v Stefan Kozlov | 4-6,2-6 |