[344] Stefan Kozlov 4-6,6-4,6-4 Donald Young [365] 2021-07-19 23:00
Stadium: Court 15 Round: 25 Ground: Hardcourt outdoor
Head to Head
| ATP - Delray Beach | 2021/01/06 16:00 | Donald Young v Stefan Kozlov | 4-6,6-4,6-4 |
| Challenger - Dallas | 2020/02/04 19:15 | Stefan Kozlov v Donald Young | 2-6,2-6 |
| Challenger - Sarasota | 2018/04/18 20:30 | Stefan Kozlov v Donald Young | 6-4,6-4 |
| ATP - Indian Wells | 2017/03/11 00:40 | Donald Young v Stefan Kozlov | 7-5,7-6 |
| ATP - Newport | 2016/07/13 18:35 | Stefan Kozlov v Donald Young | 0-6,4-6 |
Home History
| ITF - M15 Weston | 2021/07/04 15:00 | Ryan Harrison v Stefan Kozlov | 7-5,3-6,3-6 |
| ITF - M15 Weston | 2021/07/03 17:15 | Stefan Kozlov v Christian Langmo | 6-2,7-5 |
| ITF - M15 Weston | 2021/07/02 21:20 | Stefan Kozlov v Ben Shelton | 7-5,6-1 |
| ITF - M15 Weston | 2021/07/02 21:00 | Stefan Kozlov v Ben Shelton | 7-5,6-1 |
| ITF - M15 Weston | 2021/07/01 13:00 | Stefan Kozlov v Evan Zhu | 6-3,3-6,6-1 |
| ITF - M25 Tulsa | 2021/06/16 23:30 | Michail Pervolarakis v Stefan Kozlov | 7-6,6-4 |
| Challenger - Orlando | 2021/06/08 19:15 | Thiago Agustin Tirante v Stefan Kozlov | 6-3,6-1 |
| Challenger - Orlando | 2021/06/07 14:00 | Adrian Andreev v Stefan Kozlov | 6-4,4-6,4-6 |
Away History
| UTR Pro Tennis Series Atlanta | 2021/07/07 16:30 | Mac Kiger v Donald Young | 7-6,2-6,0-5 |
| UTR Pro Tennis Series Atlanta | 2021/07/06 13:30 | Andrew Rogers v Donald Young | 1-6,6-4,7-6 |
| UTR Pro Tennis Series Atlanta | 2021/07/04 15:00 | Donald Young v Juan Pablo Cenoz | 2-6,6-4,5-1 |
| Challenger - Orlando | 2021/06/07 17:15 | Peter Polansky v Donald Young | 6-2,6-2 |
| Challenger - Little Rock | 2021/06/02 22:55 | Ernesto Escobedo v Donald Young | 6-3,6-0 |
| Challenger - Tallahassee | 2021/04/20 14:00 | Ryan Harrison v Donald Young | 2-6,6-3,6-3 |
| Challenger - Tallahassee | 2021/04/19 15:00 | Donald Young v Filip Cristian Jianu | 4-6,2-6 |
| Challenger - Tallahassee | 2021/04/18 20:00 | Donald Young v Evan King | 6-1,6-2 |