Stadium: Court 1 Round: 62 Ground: Clay
| Split, Singles M-ITF-CRO-05A | 2022/04/25 10:20 | Drazen Petrovic v Frantzen, Constantin | 6-4,7-5 |
| ITF - M15 Monastir | 2022/04/06 12:35 | Frantzen, Constantin v Szymon Kielan | 3-6,5-7 |
| ITF M25 Monastir | 2022/04/04 13:30 | Frantzen, Constantin v Katuch, Jakub | 6-3,6-0 |
| ITF M25 Monastir | 2022/04/04 09:00 | Frantzen, Constantin v Stubbings, Matthew | 6-1,6-2 |
| ITF M25 Monastir | 2022/03/27 10:00 | Frantzen, Constantin v Wattanakul, Pol | 6-7,7-5,8-10 |
| ITF M25 Monastir | 2022/03/23 07:30 | Herman, Louis v Frantzen, Constantin | 6-2,6-1 |
| ITF M25 Monastir | 2022/03/20 09:00 | Frantzen, Constantin v Alexandre Aubriot | 6-3,6-3 |
| ITF - M25 Trimbach | 2022/03/17 09:00 | Haerteis, Johannes v Frantzen, Constantin | 6-3,6-7,6-2 |
| ITF - M25 Quinta Do Lago | 2021/10/18 12:20 | Kecojevic, Mihailo v Amaury Raynel | 1-6,3-6 |
| ITF - M25 Loulé | 2021/10/11 13:50 | Kecojevic, Mihailo v Gomes, Miguel | 0-6,2-6 |
| ITF - M25 Loulé | 2021/10/10 16:00 | Katticaren, Aditya v Kecojevic, Mihailo | 1-6,1-6 |
| ITF - M15 Doboj | 2021/07/11 09:30 | Kecojevic, Mihailo v Granolic, Stefan | 2-6,4-6 |
| ITF M15 Troisdorf | 2021/05/09 08:00 | Kocevar-Desman, Tom v Kecojevic, Mihailo | 6-1,6-2 |
| ITF M15 Troisdorf | 2019/05/07 08:00 | Kecojevic, Mihailo v Frawley, James | 1-6,2-6 |