Stadium: Court 3 Round: 14 Ground: Hardcourt indoor
| ITF M15 Fayetteville | 2021/09/21 17:00 | Alexander Brown v Liam Draxl | 3-6,3-6 |
| ITF M15 Champaign | 2021/09/15 17:05 | Alexander Brown v A.J Catanzariti | 1-6,2-6 |
| ITF M25 Decatur | 2021/08/02 15:00 | Bybel, Nicholas v Alexander Brown | 6-4,6-1 |
| ITF M25 Champaign | 2021/07/26 15:00 | Alexander Brown v Bruno Kuzuhara | 4-6,6-2,6-10 |
| ITF M15 Edwardsville | 2021/07/21 17:20 | Alexander Brown v Takeuchi, Kento (1987) | 6-1,2-6,2-6 |
| ITF M15 Champaign | 2021/06/23 22:30 | Pervolarakis, Michail v Alexander Brown | 6-3,6-0 |
| Tulsa, Singles Main, M-ITF-USA-16A | 2021/06/14 18:00 | Alexander Brown v Bryde, Trent | 3-6,0-6 |
| ITF M25 Wichita | 2021/06/09 21:00 | Mcnally, John v Alexander Brown | 6-4,6-2 |
| Challenger Las Vegas | 2021/10/26 22:05 | Young, Donald v Tatsuma Ito | 4-6,4-6 |
| Challenger Las Vegas | 2021/10/25 18:00 | Redlicki, Michael v Young, Donald | 6-7,6-1,6-7 |
| Challenger Las Vegas | 2021/10/24 17:00 | Young, Donald v Darian King | 6-3,3-6,6-4 |
| ITF - M15 Vero Beach | 2021/10/20 23:35 | Young, Donald v Anthrop, Jack | 6-2,7-5 |
| Challenger Columbus | 2021/09/19 17:35 | King, Evan v Young, Donald | 7-5,4-6,6-4 |
| Challenger Cary | 2021/09/13 23:25 | Young, Donald v Denis Kudla | 6-7,6-4,2-6 |
| Winston-Salem, USA | 2021/08/21 19:45 | Young, Donald v Tung-Lin Wu | 0-6,0-6 |
| Atlanta, USA | 2021/07/24 15:50 | Gojowczyk, Peter v Young, Donald | 6-4,6-1 |