Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF M25 Sharm El Sheikh | 2023/09/18 11:05 | Berk Ilkel v Kevin Portmann | 6-1,6-0 |
| ITF M15 Antalya | 2023/04/16 07:00 | Tommaso Carnevale-Miino v Kevin Portmann | 6-0,6-0 |
| ITF M15 Cairo | 2023/01/22 08:00 | Kevin Portmann v Juan Borba | 0-6,2-6 |
| ITF M25 Kairo | 2022/04/24 08:00 | Kevin Portmann v Nicolas Hollender | 4-6,0-6 |
| ITF M15 Cairo | 2022/04/17 07:30 | Kai Lemstra v Kevin Portmann | 6-0,6-0 |
| ITF M25 Trimbach | 2022/03/14 12:30 | Sandro Kopp v Kevin Portmann | 6-1,6-0 |
| ITF M15 Doha - Kval | 2021/12/26 12:00 | Kevin Portmann v Ali Alshati | 2-6,1-6 |
| ITF M15 Doha - Kval | 2021/12/19 15:20 | Mousa Alkotop v Kevin Portmann | 6-1,6-2 |
| ITF M25 Pozzuoli | 2023/09/11 15:25 | Erwin Troebinger v Andrea Colombo | 3-6,4-6 |
| ITF M25 Pozzuoli | 2023/09/10 19:45 | Andrea Militi Ribaldi v Erwin Troebinger | 4-6,5-7 |
| ITF M15 Allershausen | 2023/08/30 08:00 | Tim Ruehl v Erwin Troebinger | 6-1,6-1 |
| ITF M15 Allershausen | 2023/08/29 09:30 | Erwin Troebinger v Nicolo Toffanin | 7-6,6-2 |
| ITF M25 Bolzano | 2023/07/30 12:30 | Erwin Troebinger v Maurus Malgiaritta | 1-6,2-6 |
| ITF M25 Kramsach | 2023/07/24 07:30 | Erwin Troebinger v Luca Parenti | 4-6,6-3,4-10 |
| ITF M25 Kramsach | 2023/07/23 11:30 | Matej Galik v Erwin Troebinger | 6-0,0-6,8-10 |
| ITF M25 Telfs | 2023/07/16 09:00 | Samuel Puskar v Erwin Troebinger | 6-7,6-0,10-8 |