Stadium: Court 11 Round: 44 Ground: Hardcourt outdoor
| ITF M15 Sozopol | 2021/09/13 08:00 | Piotr Kusiewicz v Mikhail Minakov | 6-7,6-1,4-10 |
| ITF M15 Ulcinj | 2021/09/20 08:00 | Daiki Yoshimura v Alec Deckers | 6-4,3-6,10-6 |
| ITF M15 Ulcinj | 2021/09/12 08:00 | Alec Deckers v Edoardo Zanada | 6-4,3-6,9-11 |
| ITF M15 Oldenzaal | 2021/08/18 12:45 | Alec Deckers v Ryan Nijboer | 6-3,2-6,4-6 |
| ITF M15 Monastir | 2021/08/11 07:30 | Grigoriy Lomakin v Alec Deckers | 3-6,6-3,6-4 |
| ITF M15 Monastir | 2021/08/01 10:00 | Mateo Nicolas Martinez v Alec Deckers | 6-7,7-5,10-7 |
| ITF M15 Monastir | 2021/07/28 08:00 | Gabriele Bosio v Alec Deckers | 7-6,6-2 |
| ITF M15 Monastir | 2021/07/26 14:00 | Joshua Paris v Alec Deckers | 4-6,6-7 |
| ITF M15 Monastir | 2021/07/26 08:00 | Alec Deckers v Matthew Dellavedova | 7-5,2-6,10-7 |