Stadium: Court 5 Round: 26 Ground: Hardcourt outdoor
| ITF M25 Sierre | 2021/08/31 12:20 | Christian Langmo v Valentin Vacherot | 6-7,4-6 |
| ITF M25 Lesa | 2021/08/27 12:55 | Matias Franco Descotte v Christian Langmo | 6-3,6-4 |
| ITF M25 Lesa | 2021/08/26 12:15 | Christian Langmo v Facundo Arias Bisso | 6-2,6-2 |
| ITF M25 Lesa | 2021/08/25 13:45 | Simone Camposeo v Christian Langmo | 3-6,0-6 |
| ITF M25 Decatur | 2021/08/03 15:00 | Christian Langmo v Rinky Hijikata | 6-4,3-6,4-10 |
| ITF M25 Decatur | 2021/08/02 15:00 | Christian Langmo v Nicaise Muamba | 6-3,6-1 |
| ITF M25 Champaign | 2021/07/29 16:55 | Ben Shelton v Christian Langmo | 6-4,6-4 |
| ITF M25 Champaign | 2021/07/28 16:45 | Christian Langmo v Karlis Ozolins | 7-6,6-1 |
| ITF M25 Grasse | 2021/06/15 10:35 | Clement Tabur v Kristjan Tamm | 6-2,7-5 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Gilbert S K Junior v Kristjan Tamm | 6-4,6-2 |
| ITF M25 Kiseljak | 2021/05/26 14:25 | Rrezart Cungu v Kristjan Tamm | 6-3,6-4 |
| ITF M15 Brcko | 2021/05/21 07:35 | Kristjan Tamm v Dusan Rajic | 4-6,5-7 |
| ITF M15 LPD Gran Canaria | 2021/04/28 08:30 | Kristjan Tamm v Yan Bondarevskiy | 4-6,2-6 |
| ITF M15 Sibenik | 2021/04/21 07:55 | Kyrian Jacquet v Kristjan Tamm | 3-6,6-1,6-4 |
| ITF M25 Vale Do Lobo | 2021/03/10 15:10 | Kaichi Uchida v Kristjan Tamm | 3-6,6-1,6-0 |
| ITF M25 Faro | 2021/02/28 15:00 | Kristjan Tamm v Rayane Oumaouche | 4-6,7-5,1-10 |