| ITF M25 Caloundra | 2024/11/17 00:00 | Arjun Mehrotra v Stefan Kostic | 6-3,6-1 |
| ITF M25 Brisbane | 2024/11/10 01:00 | Finley Hall v Stefan Kostic | 6-3,7-6 |
| ITF M15 Kursumlijska Banja | 2024/08/28 10:20 | Stefan Kostic v Iannis Miletich | 4-6,2-6 |
| ITF M15 Pirot | 2024/08/21 10:10 | Stefan Kostic v Demetris Azoides | 0-6,2-6 |
| ITF M15 Kursumlijska Banja | 2024/08/14 07:00 | Stefan Latinov v Stefan Kostic | 6-1,7-6 |
| ITF M15 Kursumlijska Banja | 2024/08/08 09:00 | Stefan Kostic v Tommaso Compagnucci | 1-6,1-6 |
| ITF M15 Kursumlijska Banja | 2024/08/07 11:45 | Romeo Hadzimehmedovic v Stefan Kostic | 5-7,4-6 |
| ITF M15 Kursumlijska Banja | 2024/07/31 09:40 | Stefan Kostic v Franco Ribero | 2-6,2-6 |
| ITF M15 Antalya | 2023/12/17 07:00 | Mirko Lagasio v Alexander Grekul | 3-6,4-6 |
| ITF M25 Santa Margherita | 2023/04/03 08:30 | Mateo Nicolas Martinez v Mirko Lagasio | 6-4,6-1 |
| ITF M25 Santa Margherita | 2023/04/02 11:30 | Alessio Balestrieri v Mirko Lagasio | 2-6,2-6 |
| ITF M15 Antalya | 2023/03/12 11:00 | Jurriaan Bol v Mirko Lagasio | 7-5,6-2 |
| ITF M15 Antalya | 2023/03/06 08:50 | Denis Constantin Spiridon v Mirko Lagasio | 6-4,7-6 |
| ITF M15 Antalya | 2023/03/05 06:30 | Manuel Lazic v Mirko Lagasio | 3-6,5-7 |
| ITF M15 Sharm El Sheikh | 2022/11/21 08:00 | Mirko Lagasio v Yeongseok Jeong | 4-6,0-6 |
| ITF M15 Sharm El Sheikh | 2022/11/20 08:00 | Pietro Mugelli v Mirko Lagasio | 4-6,5-7 |