Stadium: Cancha 1 Round: 26 Ground: Clay
| ITF M25 Grodzisk Mazowiecki MD | 2021/08/08 12:15 | Hermans/Matuszewski v Klier Junior/Sakamoto | 6-4,7-5 |
| ITF M25 Grodzisk Mazowiecki MD | 2021/08/08 09:00 | Klier Junior/Sakamoto v Dembek/Michalski | 6-3,5-7,10-8 |
| ITF M25 Grodzisk Mazowiecki MD | 2021/08/07 16:00 | Cias/Pavlasek v Klier Junior/Sakamoto | 4-6,6-0,5-10 |
| ITF M25 Grodzisk Mazowiecki MD | 2021/08/03 09:00 | Nazaruk/Rajski v Klier Junior/Sakamoto | 3-6,1-6 |