[368] Stefan Kozlov 2-6,2-6 Donald Young [292] 2020-02-04 19:15
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 Ann Arbor | 2020/01/11 17:45 | Stefan Kozlov v Roberto Cid Subervi | 6-7,7-5,3-6 |
| Challenger Ann Arbor | 2020/01/10 17:40 | Bjorn Fratangelo v Stefan Kozlov | 6-7,2-6 |
| Challenger Ann Arbor | 2020/01/09 16:00 | Brandon Nakashima v Stefan Kozlov | 6-4,3-6,2-6 |
| Challenger Ann Arbor | 2020/01/07 19:55 | Stefan Kozlov v Renzo Olivo | 7-6,6-2 |
| Challenger Ann Arbor | 2020/01/06 19:50 | Stefan Kozlov v Arthur Rinderknech | 6-3,6-4 |
| 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 |
Away History
| Challenger Newport Beach | 2020/01/29 23:25 | Donald Young v Mitchell Krueger | 6-3,1-6,4-6 |
| Challenger Newport Beach | 2020/01/27 22:55 | Donald Young v Brandon Nakashima | 1-6,7-6,6-4 |
| Australian Open | 2020/01/14 03:45 | Donald Young v Jason Jung | 4-6,7-6,1-6 |
| 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 |