Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 - Monastir | 2021/09/22 08:00 | Guy Den Ouden v Ryota Tanuma | 6-7,2-6 |
| ITF M15 - Allershausen | 2021/09/05 11:00 | Guy Den Ouden v Mick Veldheer | 6-0,6-4 |
| ITF M15 - Allershausen | 2021/09/04 13:10 | Guy Den Ouden v Mats Rosenkranz | 6-4,4-6,6-4 |
| ITF M15 - Allershausen | 2021/09/03 12:35 | Guy Den Ouden v Juan Ignacio Galarza | 7-5,6-3 |
| ITF M15 - Allershausen | 2021/09/02 13:40 | Peter Heller v Guy Den Ouden | 6-7,3-6 |
| ITF M15 - Allershausen | 2021/09/01 11:30 | Guy Den Ouden v Hazem Naw | 6-4,3-6,6-4 |
| ITF M15 - Huy | 2021/08/29 13:00 | Gauthier Onclin v Guy Den Ouden | 6-4,5-7,1-6 |
| ITF M15 - Huy | 2021/08/28 11:00 | Raphael Collignon v Guy Den Ouden | 3-6,4-6 |
| ITF - M15 - Monastir | 2021/09/19 12:00 | Tathagat Charantimath v Mohamed Amine Aissa Khelifa | 6-1,3-6,12-10 |
| ITF - M15 - Monastir | 2021/09/13 10:30 | Thanapet Chanta v Mohamed Amine Aissa Khelifa | 6-3,7-6 |
| ITF - M15 - Monastir | 2021/09/12 09:30 | Tushar Sharma v Mohamed Amine Aissa Khelifa | 1-6,3-6 |
| ITF - M15 - Monastir | 2021/07/25 10:30 | Mohamed Amine Aissa Khelifa v Jacob Brumm | 2-6,0-6 |
| ITF - M15 - Monastir | 2021/07/04 11:00 | Mohamed Amine Aissa Khelifa v Sebastian Eguez | 2-6,2-6 |
| ITF - M15 - Monastir | 2021/06/27 13:00 | Mohamed Amine Aissa Khelifa v Jacob Brumm | 3-6,1-6 |
| ITF - M15 - Monastir | 2021/06/06 09:00 | Mohamed Amine Aissa Khelifa v Lucas Cotler | 4-6,3-6 |
| ITF - M15 - Monastir | 2021/05/30 09:00 | Taketo Takamisawa v Mohamed Amine Aissa Khelifa | 4-6,6-0,10-7 |