| ITF M25 Decatur | 2021/08/02 15:00 | Nicholas Bybel 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 Kento Takeuchi | 6-1,2-6,2-6 |
| ITF M15 Champaign | 2021/06/23 22:30 | Michail Pervolarakis v Alexander Brown | 6-3,6-0 |
| ITF M25 Tulsa | 2021/06/14 18:00 | Alexander Brown v Trent Bryde | 3-6,0-6 |
| ITF M25 Wichita | 2021/06/09 21:00 | John McNally v Alexander Brown | 6-4,6-2 |
| Challenger Columbus | 2020/02/25 15:00 | Alexander Brown v Johannes Haerteis | 3-6,6-7 |
| Challenger Cleveland | 2020/02/10 18:45 | Alexander Brown v Raymond Sarmiento | 4-6,2-6 |
| ITF M25 Koksijde | 2021/08/17 08:00 | Olivier Rojas v Alexander Kotzen | 6-4,6-3 |
| ITF M15 Gdynia | 2021/08/10 08:00 | Alexander Kotzen v Olaf Pieczkowski | 2-6,6-2,8-10 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Alexander Kotzen v Piotr Pawlak | 6-2,6-0 |
| ITF M15 Parnu | 2021/08/05 10:30 | Ergi Kirkin v Alexander Kotzen | 7-6,6-4 |
| ITF M15 Parnu | 2021/08/04 09:05 | Julius Tverijonas v Alexander Kotzen | 6-3,5-7,2-6 |
| ITF M15 Vejle | 2021/07/30 08:00 | Ergi Kirkin v Alexander Kotzen | 6-2,6-3 |
| ITF M15 Vejle | 2021/07/27 09:15 | Marius Ruzgas v Alexander Kotzen | 2-6,6-4,3-6 |
| ITF M15 Esch/Alzette | 2021/07/22 13:10 | Tommaso Compagnucci v Alexander Kotzen | 6-2,6-0 |