Ground: Hardcourt outdoor
| ITF M25 Poznan MD | 2021/08/25 15:50 | Oetzbach/Scaglia v Klier Junior/Marcondes | 3-6,4-6 |
| ITF M15 Gdynia MD | 2021/08/13 11:00 | Mikula/Wojcik v Klier Junior/Marcondes | 2-6,7-6,10-7 |
| ITF M15 Gdynia MD | 2021/08/12 14:00 | Bolardt/Stepanek v Klier Junior/Marcondes | 4-6,3-6 |
| ITF M15 Gdynia MD | 2021/08/10 12:00 | Loffhagen/Strombachs v Klier Junior/Marcondes | 3-6,6-7 |
| ITF M15 Monastir MD | 2021/04/24 13:30 | Klier Junior/Marcondes v Ghorbel/Gutierrez | 3-6,6-1,8-10 |
| ITF M15 Monastir MD | 2021/04/23 17:15 | Klier Junior/Marcondes v Bergevi/Mridha | 6-4,6-3 |
| ITF M15 Monastir MD | 2021/04/20 12:30 | Klier Junior/Marcondes v Bouquier/Pietri | 6-4,6-1 |
| ITF M15 Monastir MD | 2021/04/18 14:30 | Klier Junior/Marcondes v Iradukunda/Tessa | 6-2,6-3 |