[368] Stefan Kozlov 2-6,2-6 Donald Young [292] 2019-12-28 11:15
Stadium: Hamilton Family Stadium Round: 24 Ground: Hardcourt indoor
Head to Head
| 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
| Challenger Champaign | 2019/11/15 16:00 | Stefan Kozlov v Jeffrey John Wolf | 2-6,2-6 |
| Challenger Champaign | 2019/11/14 17:00 | Stefan Kozlov v Evan Song | 6-4,4-6,6-1 |
| Challenger Champaign | 2019/11/13 21:10 | Denis Kudla v Stefan Kozlov | 3-6,3-6 |
| Challenger Champaign | 2019/11/12 00:00 | Simon Carr v Stefan Kozlov | 2-6,6-4,6-7 |
| ITF M25 Naples | 2019/11/01 15:55 | Cristian Rodriguez v Stefan Kozlov | 6-2,6-2 |
| ITF M25 Naples | 2019/10/31 14:00 | Sam Riffice v Stefan Kozlov | 2-6,4-6 |
| ITF M25 Naples | 2019/10/29 18:40 | Mwendwa Mbithi v Stefan Kozlov | 4-6,3-6 |
| Challenger Las Vegas | 2019/10/18 18:00 | Stefan Kozlov v James Duckworth | 2-6,3-6 |
Away History
| Challenger Houston | 2019/11/13 16:00 | Alexis Galarneau v Donald Young | 3-6,6-3,6-0 |
| Challenger Knoxville | 2019/11/05 01:00 | Liam Broady v Donald Young | 7-6,6-3 |
| Challenger Charlottesville | 2019/10/28 20:45 | Donald Young v Blaz Kavcic | 3-6,6-7 |
| Challenger Las Vegas | 2019/10/16 19:15 | Donald Young v Gonzalo Escobar | 6-7,5-7 |
| Challenger Fairfield | 2019/10/11 02:00 | Jack Draper v Donald Young | 6-3,7-6 |
| Challenger Fairfield | 2019/10/09 20:10 | Alexander Sarkissian v Donald Young | 6-2,4-6,0-6 |
| Challenger Tiburon | 2019/09/23 23:00 | Donald Young v Ryan Shane | 6-1,6-1 |
| Challenger Columbus 3 | 2019/09/19 16:50 | Donald Young v Roberto Quiroz | 7-5,4-6,4-6 |