Stadium: Court 6 Round: 62 Ground: Hardcourt outdoor
| 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 |
| ITF M15 Chornomorsk | 2021/09/01 09:35 | Lev Levyatov v Illya Beloborodko | 2-6,1-6 |
| ITF M15 Telavi | 2021/08/01 06:00 | Lev Levyatov v Alexander Boborykin | 2-6,0-6 |
| ITF M25 Telavi | 2021/07/26 11:30 | Federico Bertuccioli v Lev Levyatov | 6-2,6-2 |
| ITF M25 Telavi | 2021/07/26 07:30 | Raz Haviv v Lev Levyatov | 3-6,3-6 |
| ITF M15 Jerusalem | 2021/05/09 08:30 | Charles Minc v Lev Levyatov | 6-4,6-3 |
| ITF M15 Ramat Hasharon | 2021/05/03 07:00 | Lev Levyatov v Bradley Paliska | 0-6,3-6 |