Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M25 - Oldenzaal - Herrdubbel | 2023/08/31 17:50 | Hartig/Sobbe v Den Heijer/Pontjodikromo | 2-6,4-6 |
| ITF M25 - Oldenzaal - Herrdubbel | 2023/08/31 15:05 | Hartig/Sobbe v Meijer/Wagenaar | 7-6,6-1 |
| ITF M15 - Eupen - Herrdubbel | 2023/08/12 13:30 | Bozemoj/Pel v Hartig/Sobbe | 6-3,6-3 |
| ITF M15 - Eupen - Herrdubbel | 2023/08/11 12:00 | Hartig/Sobbe v Hammond/Hornung | 7-5,6-3 |
| ITF M15 - Eupen - Herrdubbel | 2023/08/09 17:35 | Sannen/Stanke v Hartig/Sobbe | 6-7,4-6 |
| ITF M25 - Marburg - Herrdubbel | 2023/07/06 16:20 | Hartig/Sobbe v Gadamauri/Hermans | 1-6,1-6 |
| ITF M25 - Marburg - Herrdubbel | 2023/07/04 14:55 | Hartig/Sobbe v Matuszewski/Salazar | 6-3,6-1 |