Stadium: Court 1N Round: 26 Ground: Hardcourt outdoor
| ITF M15 Champaign | 2021/09/15 19:50 | Alexander Kotzen v Lucas Horve | 6-2,6-3 |
| 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 Champaign | 2021/09/15 15:00 | Cannon Kingsley v Ezekiel Clark | 6-3,6-2 |
| ITF M25 Decatur | 2021/08/06 17:50 | Cannon Kingsley v Aidan Mchugh | 3-6,3-6 |
| ITF M25 Decatur | 2021/08/05 14:45 | Jason Kubler v Cannon Kingsley | 6-7,6-3,3-6 |
| ITF M25 Decatur | 2021/08/04 13:50 | Blu Baker v Cannon Kingsley | 6-4,3-6,2-6 |
| ITF M25 Champaign | 2021/07/27 16:45 | Alfredo Perez v Cannon Kingsley | 2-6,6-3,10-7 |
| ITF M25 Champaign | 2021/07/26 15:00 | Christian Lakoseljac v Cannon Kingsley | 2-6,2-6 |
| ITF M15 Edwardsville | 2021/07/24 16:00 | Rinky Hijikata v Cannon Kingsley | 7-6,6-7,6-2 |
| ITF M15 Edwardsville | 2021/07/23 14:00 | William Griffith v Cannon Kingsley | 3-6,2-6 |