| UTR Pro Tennis Series Zadar | 2021/11/16 09:00 | Christos Keisidis v Denis Parshutin | 6-3,6-7,6-3 |
| UTR Pro Tennis Series Zadar | 2021/11/15 12:00 | Olexiy Kolisnyk v Christos Keisidis | 7-5,3-6,4-6 |
| UTR Pro Tennis Series Nis | 2021/10/10 08:00 | Christos Keisidis v Vladimir Popov | 6-1,5-2 |
| UTR Pro Tennis Series Nis | 2021/10/09 11:00 | Christos Keisidis v Lawrence Bataljin | 6-4,6-2 |
| UTR Pro Tennis Series Nis | 2021/10/08 15:45 | Dusan Trunic v Christos Keisidis | 2-6,2-5 |
| UTR Pro Tennis Series Nis | 2021/10/07 08:30 | George Botezan v Christos Keisidis | 6-3,6-3 |
| UTR Pro Tennis Series Nis | 2021/10/05 14:00 | Aleksa Mardjonovic v Christos Keisidis | 2-6,7-5,6-4 |
| UTR Pro Tennis Series Nis | 2021/10/04 11:30 | Christos Keisidis v Alexander Lazov | 6-3,0-6,3-6 |
| UTR Pro Tennis Series Zadar | 2021/11/16 11:44 | Olexiy Kolisnyk v Alexander Chepik | 3-6,2-6 |
| UTR Pro Tennis Series Zadar | 2021/11/15 12:00 | Denis Parshutin v Alexander Chepik | 6-7,3-5 |
| UTR Pro Tennis Series Zadar | 2021/11/14 12:00 | Alexander Chepik v Egor Matvievici | 6-4,4-6,6-2 |
| ITF M25 Nur-Sultan | 2021/10/26 05:00 | Daniel Ibragimov v Alexander Chepik | 6-3,6-3 |
| ITF M25 Nur-Sultan | 2021/10/25 09:15 | Egor Khotchenkov v Alexander Chepik | 2-6,3-6 |
| ITF M25 Nur-Sultan | 2021/10/19 05:05 | Alec Beckley v Alexander Chepik | 7-6,6-3 |
| ITF M25 Nur-Sultan | 2021/10/18 10:35 | Adil Karakayev v Alexander Chepik | 2-6,3-6 |
| ITF M15 Kazan | 2021/10/13 14:25 | Alexander Chepik v Alibek Kachmazov | 1-6,1-6 |