Stadium: Court 2 Round: 25 Ground: Clay
| Challenger Napoli | 2021/10/04 14:00 | Miljan Zekic v Gian Marco Moroni | 1-6,7-6,2-6 |
| Challenger Murcia | 2021/10/01 09:00 | Miljan Zekic v Tallon Griekspoor | 0-6,6-0,3-6 |
| Challenger Murcia | 2021/09/29 13:55 | Miljan Zekic v Mats Rosenkranz | 6-4,6-4 |
| Challenger Murcia | 2021/09/27 12:30 | Ramkumar Ramanathan v Miljan Zekic | 6-3,4-6,3-6 |
| Challenger Banja Luka | 2021/09/06 16:30 | Miljan Zekic v Zdenek Kolar | 3-6,1-6 |
| Challenger Poznan | 2021/07/29 13:30 | Miljan Zekic v Botic Van De Zandschulp | 4-6,1-6 |
| Challenger Poznan | 2021/07/27 09:45 | Miljan Zekic v Gastao Elias | 6-2,7-5 |
| Challenger Poznan | 2021/07/26 10:00 | Joao Domingues v Miljan Zekic | 4-6,6-4,6-2 |
| ITF M15 East Lansing | 2021/11/19 20:00 | Raymond Sarmiento v Sebastian Gima | 6-2,6-4 |
| ITF M15 East Lansing | 2021/11/18 22:20 | Ozan Baris v Sebastian Gima | 6-1,4-6,4-6 |
| ITF M15 East Lansing | 2021/11/16 21:00 | Alexander Bernard v Sebastian Gima | 6-7,4-6 |
| ITF M15 Antalya | 2021/11/02 06:00 | Sebastian Gima v Matias Ponce De Leon | 3-6,4-6 |
| ITF M15 Antalya | 2021/10/31 07:00 | Sebastian Gima v Ignacio Cuzzani | 6-2,6-4 |
| ITF M15 Antalya | 2021/10/26 07:20 | Sebastian Gima v Aliaksandr Bulitski | 5-7,2-6 |
| ITF M15 Antalya | 2021/10/25 07:00 | Sebastian Gima v Daniil Gusev | 6-1,6-0 |
| ITF M15 Antalya | 2021/10/24 07:00 | Sebastian Gima v Vlad Andrei Dumitru | 6-2,6-0 |