Stadium: Court 17 Round: 62 Ground: Clay
| ITF M15 Antalya | 2021/03/08 10:00 | Stefan Palosi v Simeon Terziev | 6-3,6-0 |
| ITF M15 Antalya | 2021/06/20 07:00 | Stefan Palosi v Matteo Meneghetti | 6-1,6-2 |
| UTR Pro Tennis Series Bucharest | 2021/06/06 06:00 | Oscar Jose Gutierrez v Stefan Palosi | 7-5,4-6,2-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/05 08:30 | Marcelo Zormann v Stefan Palosi | 6-7,3-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/04 11:30 | Bogdan Borza v Stefan Palosi | 4-6,6-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/03 12:00 | Juan Ignacio Galarza v Stefan Palosi | 3-6,4-6 |
| UTR Pro Tennis Series Bucharest | 2021/06/02 17:30 | Vladislav Melnic v Stefan Palosi | 4-6,6-3,1-6 |
| UTR Pro Tennis Series Bucharest | 2021/05/30 11:30 | Hugo Pierre v Stefan Palosi | 3-6,0-6 |
| ITF M15 Bucharest | 2021/05/26 13:55 | Stefan Palosi v Nicolae Frunza | 6-3,6-7,3-6 |
| ITF M15 Antalya | 2021/06/20 07:00 | Simeon Terziev v Gabriel Roveri Sidney | 4-6,7-6,10-8 |
| ITF M15 Skopje | 2021/06/06 12:00 | Max Houkes v Simeon Terziev | 6-1,6-4 |
| ITF M15 Antalya | 2021/04/26 07:00 | Fabrizio Andaloro v Simeon Terziev | 4-6,6-4,11-9 |
| ITF M15 Antalya | 2021/04/25 07:00 | Credit Chaiyarin v Simeon Terziev | 3-6,1-6 |
| ITF M15 Antalya | 2021/04/18 07:00 | Kristof Minarik v Simeon Terziev | 6-1,6-1 |
| UTR Pro Tennis Series Pazardzhik | 2021/04/03 10:00 | Jules Marie v Simeon Terziev | 6-3,6-0 |
| UTR Pro Tennis Series Pazardzhik | 2021/04/02 07:00 | Ilya Snitari v Simeon Terziev | 6-0,6-3 |
| UTR Pro Tennis Series Pazardzhik | 2021/04/01 07:00 | Yurii Dzhavakian v Simeon Terziev | 4-6,4-5 |