Stadium: Court 21 Round: 25 Ground: Clay
| ITF M15 Kazan | 2021/10/13 10:05 | Ivan Liutarevich v Petr Bar Biryukov | 2-6,7-5,6-1 |
| ITF M15 Telavi | 2021/08/02 08:00 | Petr Bar Biryukov v Giorgi Javakhishvili | 7-6,4-6,9-11 |
| ITF M25 Telavi | 2021/07/26 13:10 | Petr Bar Biryukov v Ondrej Horak | 4-6,2-6 |
| ITF M25 Nur-Sultan | 2021/07/09 07:00 | Petr Bar Biryukov v Beibit Zhukayev | 4-6,3-6 |
| ITF M25 Nur-Sultan | 2021/07/08 05:00 | Petr Bar Biryukov v Vladyslav Manafov | 3-6,6-2,6-3 |
| ITF M25 Nur-Sultan | 2021/07/07 07:00 | Kirill Kolganov v Petr Bar Biryukov | 2-6,1-6 |
| ITF M25 Nur-Sultan | 2021/07/06 05:55 | Petr Bar Biryukov v Danil Ozernoy | 6-3,7-6 |
| ITF M15 Antalya | 2021/06/27 06:30 | Inigo G Olasagasti v Petr Bar Biryukov | 7-6,1-6,10-5 |
| ITF M25 Guayaquil | 2021/08/02 19:30 | Farzin Danny Amiri v McClain Kessler | 4-6,1-6 |
| ITF M25 Guayaquil | 2021/08/02 14:00 | Farzin Danny Amiri v Alexander Zederbauer | 6-4,6-3 |
| ITF M25 Guayaquil | 2021/08/01 14:00 | Sergio Luis H Ramirez v Farzin Danny Amiri | 6-7,2-6 |
| ITF M15 Antalya | 2021/06/27 06:30 | Ray Ho v Farzin Danny Amiri | 6-2,6-2 |
| ITF M15 Antalya | 2021/06/20 07:00 | Olexiy Kolisnyk v Farzin Danny Amiri | 6-4,7-6 |
| ITF M15 Antalya | 2021/06/13 07:30 | Farzin Danny Amiri v Filip Duda | 6-3,4-6,6-10 |
| ITF M15 Antalya | 2021/06/07 11:15 | Farzin Danny Amiri v Buvaysar Gadamauri | 6-3,4-6,8-10 |
| ITF M15 Antalya | 2021/06/06 07:30 | Adil Karimov v Farzin Danny Amiri | 1-6,1-6 |