Stadium: Court 7 Round: 62 Ground: Clay
| ITF - M15 Doboj | 2021/07/15 08:00 | Peter Fajta v Frane Nincevic | 4-6,6-3,7-6 |
| ITF - M15 Doboj | 2021/07/13 11:30 | Frane Nincevic v Christoffer Solberg | 6-2,7-6 |
| ITF - M25 Velenje | 2021/07/06 08:00 | Frane Nincevic v Nemanja Malesevic | 4-6,6-1,5-10 |
| ITF - M25 Velenje | 2021/07/05 09:00 | Frane Nincevic v Nicolas Bruna | 5-7,7-6,11-9 |
| UTR Pro Tennis Series - Zadar | 2021/07/03 07:00 | Vito Tonejc v Frane Nincevic | 6-4,5-2 |
| UTR Pro Tennis Series - Zadar | 2021/07/02 12:30 | Josip Krstanovic v Frane Nincevic | 6-4,1-6,7-5 |
| UTR Pro Tennis Series - Zadar | 2021/07/01 09:30 | Constant De La Bassetiere v Frane Nincevic | 3-6,2-6 |
| UTR Pro Tennis Series - Zadar | 2021/06/29 11:00 | Warren Sinius v Frane Nincevic | 5-7,3-6 |
| ITF - M15 Novi Sad | 2021/07/26 10:30 | Aleksandar Tomas v Koray Kirci | 4-6,2-6 |
| ITF - M25 Telfs | 2021/07/13 11:10 | Gonzalo Lama v Aleksandar Tomas | 6-3,6-1 |
| ITF - M25 Belehrad | 2021/06/27 07:00 | Aleksandar Tomas v Petar Pjevcevic | 3-6,1-6 |
| ITF - M15 - Antalya | 2021/06/20 07:00 | Daiki Yoshimura v Aleksandar Tomas | 6-1,6-3 |
| ITF - M15 - Antalya | 2021/06/13 07:30 | Oleg Prihodko v Aleksandar Tomas | 6-2,6-2 |
| ITF - M15 Brčko | 2021/05/21 13:25 | Aleksandar Tomas v Viktor Jovic | 0-6,1-6 |
| ITF - M15 Brčko | 2021/05/21 09:45 | Bogdan Bajic v Aleksandar Tomas | 1-6,3-6 |
| ITF - M15 Brčko | 2021/05/18 14:00 | Obrad Markovski v Aleksandar Tomas | 4-6,1-6 |