Stadium: Court 6 Round: 27 Ground: Hardcourt indoor
| ITF M15 St Petersburg | 2021/04/08 07:00 | Ivan Nedelko v Simon Freund | 6-2,6-4 |
| ITF M15 St Petersburg | 2021/04/06 09:00 | Ivan Nedelko v Petr Bar Biryukov | 6-3,6-1 |
| ITF M15 St Petersburg | 2021/04/05 08:35 | Ivan Nedelko v Martin Borisiouk | 6-2,6-1 |
| ITF M15 St Petersburg | 2021/04/04 13:20 | Ivan Nedelko v Sergei Pogosian | 6-1,6-1 |
| Challenger Oeiras | 2021/03/28 10:00 | Francisco Cabral v Ivan Nedelko | 6-2,5-7,6-4 |
| Challenger Zadar | 2021/03/25 09:30 | Nikola Milojevic v Ivan Nedelko | 6-2,6-1 |
| Challenger Zadar | 2021/03/23 13:30 | Teymuraz Gabashvili v Ivan Nedelko | 2-6,6-2,3-6 |
| Challenger Zadar | 2021/03/22 09:00 | Ivan Nedelko v Nerman Fatic | 6-4,1-6,3-6 |
| ITF M15 St Petersburg | 2021/04/08 10:45 | Sarp Agabigun v Alexey Zakharov | 6-2,6-4 |
| ITF M15 St Petersburg | 2021/04/07 11:15 | Sarp Agabigun v Aleksei Abazov | 6-0,6-0 |
| ITF M15 St Petersburg | 2021/04/05 06:55 | Sarp Agabigun v Igor Trunov | 6-0,6-2 |
| ITF M15 St Petersburg | 2021/04/04 09:50 | Sarp Agabigun v Klim Kozyrev | 6-3,6-0 |
| ITF M15 Antalya | 2021/03/16 07:00 | Sarp Agabigun v Edoardo Lavagno | 4-6,7-5,8-10 |
| ITF M15 Antalya | 2021/03/15 08:30 | Sarp Agabigun v Vladislav Gorbatenko | 6-1,6-4 |
| ITF M15 Antalya | 2021/03/14 07:00 | Sarp Agabigun v Carlo Alberto Fossati | 7-5,6-4 |
| ITF M15 Antalya | 2021/03/11 07:00 | Matheus Almeida v Sarp Agabigun | 0-0 |