| 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 |
| ITF M15 Kouvola | 2021/05/26 11:40 | Iiro Vasa v Karl Kiur Saar | 4-6,0-6 |
| ITF M15 Monastir | 2021/04/26 09:00 | Andrea Picchione v Iiro Vasa | 6-2,6-4 |
| ITF M15 Monastir | 2021/04/25 11:30 | Niklas Waldner v Iiro Vasa | 1-6,4-6 |
| ITF M15 Parnu | 2021/08/04 13:30 | Siim Troost v Eero Vasa | 6-3,6-1 |
| ITF M15 Parnu | 2021/08/03 07:00 | Eero Vasa v Leevi Saatela | 7-5,6-3 |
| Challenger Tampere | 2021/07/18 09:45 | Alexander Erler v Eero Vasa | 6-2,3-6,6-2 |
| ITF M15 Helsinki | 2021/06/02 06:30 | Eero Vasa v Clement Tabur | 3-6,3-6 |
| ITF M15 Kouvola | 2021/05/27 07:00 | Lorenzo Rottoli v Eero Vasa | 6-3,6-1 |
| ITF M15 Kouvola | 2021/05/26 11:45 | Alafia Ayeni v Eero Vasa | 5-7,2-6 |
| ITF M15 Bratislava | 2021/03/09 12:00 | Eero Vasa v Amaury Raynel | 3-6,3-6 |
| ITF M15 Bratislava | 2021/03/01 09:00 | Eero Vasa v Peter Nad | 5-7,6-3,8-10 |