Stadium: Carpet 16 Round: 25 Ground: Clay
| ITF M15 Antalya | 2021/10/17 07:00 | Francesco Maestrelli v Thijmen Loof | 2-6,7-5,10-7 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 12:01 | Thijmen Loof v Jurriaan Bol | 2-6,3-5 |
| UTR Pro Tennis Series Mulheim | 2021/09/25 08:30 | George Botezan v Thijmen Loof | 1-6,0-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/24 11:00 | Thijmen Loof v Guy Den Heijer | 3-6,2-6 |
| UTR Pro Tennis Series Mulheim | 2021/09/22 09:30 | Thijmen Loof v Lawrence Bataljin | 6-3,5-3 |
| UTR Pro Tennis Series Mulheim | 2021/09/21 11:00 | Thijmen Loof v Jose Antonio Rodriguez Rodriguez | 7-6,5-4 |
| UTR Pro Tennis Series Mulheim | 2021/09/20 12:30 | Buvaysar Gadamauri v Thijmen Loof | 6-1,6-4 |
| ITF M25 Plaisir | 2021/09/12 14:10 | Jordan Betesh v Thijmen Loof | 6-3,6-3 |
| ITF M15 Antalya | 2021/10/21 07:00 | Marsel Ilhan v Billy Harris | 3-6,4-6 |
| ITF M15 Antalya | 2021/10/20 08:20 | Marsel Ilhan v Federico Campana | 6-3,7-6 |
| ITF M15 Antalya | 2021/10/13 09:10 | Marsel Ilhan v Mircea-Alexandru Jecan | 4-6,6-3,5-7 |
| ITF M15 Novi Sad | 2021/08/05 12:00 | Mariano Navone v Marsel Ilhan | 6-3,6-1 |
| ITF M15 Novi Sad | 2021/08/03 12:10 | Luka Pavlovic v Marsel Ilhan | 3-6,4-6 |
| ITF M15 Novi Sad | 2021/07/28 07:30 | Gorazd Srbljak v Marsel Ilhan | 6-2,6-4 |
| ITF M15 Antalya | 2021/07/02 06:25 | Marsel Ilhan v Carlos Sanchez Jover | 2-6,6-7 |
| ITF M15 Antalya | 2021/07/01 06:30 | Marsel Ilhan v Hanwen Li | 6-1,6-2 |