Stadion: Court 3 Round: 44 Ground: Clay
| ITF - M25 - Posen | 2021/08/22 08:00 | Harry Wendelken v Vojtech Vlkovsky | 6-3,6-4 |
| ITF - M15 - Lodz | 2021/08/18 10:05 | Alejo Lorenzo Lingua Lavallen v Harry Wendelken | 6-2,4-6,6-4 |
| ITF - M15 - Lodz | 2021/08/16 11:30 | Harry Wendelken v Kamil Gajewski | 6-3,6-7,10-7 |
| ITF - M15 - Lodz | 2021/08/16 08:00 | Harry Wendelken v Mikolaj Borkowski | 6-0,6-3 |
| ITF - M15 - Gdynia | 2021/08/10 08:00 | Luke Johnson v Harry Wendelken | 6-3,6-7,10-5 |
| ITF - M15 - Gdynia | 2021/08/09 08:00 | Dominik Nazaruk v Harry Wendelken | 1-6,1-6 |
| ITF - M15 - Gdynia | 2021/08/08 08:00 | Yann Wojcik v Harry Wendelken | 6-7,1-6 |
| ITF - M25 - Idanha-A-Nova | 2021/07/11 13:00 | Francisco Rocha v Harry Wendelken | 7-6,6-4 |
| ITF - M25 - Posen | 2021/08/22 08:00 | Jesse De Jager v Ioannis Stamoulos | 6-3,6-0 |
| ITF - M15 - Lodz | 2021/08/16 09:30 | Alan Bojarski v Jesse De Jager | 7-5,7-5 |
| ITF - M15 - Lodz | 2021/08/15 09:30 | Jesse De Jager v Sean Hess | 6-4,3-6,10-7 |
| ITF - M25 - Pitesti | 2021/08/02 08:30 | Ray Ho v Jesse De Jager | 6-2,4-6,10-5 |
| ITF - M25 - Pitesti | 2021/08/01 10:00 | Jesse De Jager v Andrei Cuceu | 1-6,6-3,10-4 |
| ITF - M25 - Telfs | 2021/07/12 10:35 | Jesse De Jager v Francisco Vittar | 1-6,6-2,8-10 |
| ITF - M15 - Alkmaar | 2020/08/24 08:30 | Jesse De Jager v Buvaysar Gadamauri | 2-6,2-6 |
| ITF - M15 - Alkmaar | 2020/08/23 11:00 | Jesse De Jager v Sebastian Zapata | 6-4,6-2 |