Stadium: Court 12 Round: 44 Ground: Clay
| ITF M15 Haren | 2023/09/03 08:00 | Claus Piening v Daan Meijer | 6-2,6-1 |
| ITF M25 Esch/Alzette | 2024/07/14 11:35 | Noah Martens v Daan Meijer | 6-2,6-2 |
| ITF M15 Haren | 2023/09/03 08:00 | Claus Piening v Daan Meijer | 6-2,6-1 |
| ITF M15 Eupen | 2024/08/04 11:00 | Maikel De Boes v Claus Piening | 6-3,2-6,10-7 |
| ITF M15 Alkmaar | 2024/06/24 10:30 | Claus Piening v Tomi Van den Ham | 3-6,1-6 |
| ITF M15 Alkmaar | 2024/06/23 11:30 | Julian Desousa v Claus Piening | 4-6,5-7 |
| ITF M15 Meerbusch | 2024/04/22 09:00 | Yvo Panak v Claus Piening | 6-1,6-2 |
| ITF M15 Monastir | 2024/03/31 10:00 | Claus Piening v Julius Augunas | 2-6,4-6 |
| ITF M15 Monastir | 2024/01/08 08:00 | Liam Delicata v Claus Piening | 6-2,6-0 |
| ITF M15 Monastir | 2024/01/07 12:00 | Claus Piening v Nicolas Philibert | 6-4,6-4 |
| ITF M15 Monastir | 2023/10/29 07:30 | Claus Piening v Sven Corbinais | 1-6,6-7 |