 Poland: M25 Poznan - Doubles - Main |
|---|
| Quarter-finals | Pawelski M./Pieczonka F. | Klier Junior G./Marcondes I. | WO. | details | 26.08.2021 |
| 1/8-finals | Oetzbach A./Scaglia M. | Klier Junior G./Marcondes I. | 0:2 (3:6, 4:6) | details | 25.08.2021 |
| 1/8-finals | Juszczak P./Dembek M. | Klier Junior G./Marcondes I. | CAN. | details | 25.08.2021 |
| Poland: M15 Gdynia - Doubles - Main |
|---|
| Semi-finals | Mikula M./Wojcik Y. | Klier Junior G./Marcondes I. | 2:1 (2:6, 7:611, 10:7) | details | 13.08.2021 |
| Quarter-finals | Bolardt A./Stepanek A. | Klier Junior G./Marcondes I. | 0:2 (4:6, 3:6) | details | 12.08.2021 |
| 1/8-finals | Loffhagen G./Strombachs R. | Klier Junior G./Marcondes I. | 0:2 (3:6, 63:7) | details | 10.08.2021 |
 Tunisia: M15 Monastir 14 - Doubles - Main |
|---|
| Final | Klier Junior G./Marcondes I. | Ghorbel A./Gutierrez O. J. | 1:2 (3:6, 6:1, 8:10) | details | 24.04.2021 |
| Semi-finals | Klier Junior G./Marcondes I. | Bergevi F./Mridha J. | 2:0 (6:4, 6:3) | details | 23.04.2021 |
| Quarter-finals | Coulibaly E./Negritu Ch. | Klier Junior G./Marcondes I. | WO. | details | 22.04.2021 |
| 1/8-finals | Klier Junior G./Marcondes I. | Bouquier A./Pietri B. | 2:0 (6:4, 6:1) | details | 20.04.2021 |
| Tunisia: M15 Monastir 13 - Doubles - Main |
|---|
| Final | Klier Junior G./Marcondes I. | Iradukunda G./Tessa L. | 2:0 (6:2, 6:3) | details | 18.04.2021 |
| Semi-finals | Alves M./Bouquier A. | Klier Junior G./Marcondes I. | 0:2 (4:6, 4:6) | details | 16.04.2021 |
| Quarter-finals | Imai S./Shimabukuro S. | Klier Junior G./Marcondes I. | 0:2 (4:6, 3:6) | details | 15.04.2021 |
| 1/8-finals | Klier Junior G./Marcondes I. | Roberts J./Zhu E. | 2:0 (6:3, 6:1) | details | 14.04.2021 |
