Stadium: Court 5 Round: 54 Ground: Hardcourt indoor
| ITF M25 - Jönköping | 2021/09/21 09:20 | Marvin Moeller v Harry Wendelken | 4-6,7-5,6-1 |
| ITF M25 - Jönköping | 2021/09/20 07:30 | Harry Wendelken v Eirik Groener | 6-2,6-1 |
| ITF M25 - Poznan | 2021/08/26 14:15 | Felix Gill v Harry Wendelken | 6-1,6-4 |
| ITF M25 - Poznan | 2021/08/25 10:00 | Harry Wendelken v Gilbert S K Junior | 3-6,6-4,6-2 |
| ITF M25 - Poznan | 2021/08/24 16:10 | Harry Wendelken v Fermin Calvo Barcelo | 6-2,6-3 |
| ITF M25 - Poznan | 2021/08/24 08:00 | Harry Wendelken v Jesse De Jager | 6-1,6-3 |
| ITF M25 - Poznan | 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 M25 - Falun | 2021/09/26 08:00 | Leevi Saatela v Iiro Vasa | 4-6,2-6 |
| ITF M15 - Bratislava | 2021/08/23 09:00 | Jakub Kroslak v Iiro Vasa | 6-1,6-3 |
| ITF M15 - Bratislava | 2021/08/16 08:00 | Iiro Vasa v Eero Vasa | 1-6,3-6 |
| ITF M15 - Parnu | 2021/08/04 10:10 | Iiro Vasa v Otto Virtanen | 5-7,2-6 |
| ITF M15 - Parnu | 2021/08/03 08:30 | Martins Rocens v Iiro Vasa | 3-6,7-6,7-10 |
| ITF M15 - Vejle | 2021/07/26 08:00 | Adrian Oetzbach v Iiro Vasa | 6-3,7-5 |
| Challenger - Tampere | 2021/07/18 12:55 | Iiro Vasa v Arthur Cazaux | 2-6,6-7 |
| ITF M15 - Helsinki | 2021/06/02 06:30 | Iiro Vasa v Matvey Minin | 2-6,4-6 |