 USA: US Open - Doubles - Main |
|---|
| 1/8-finals | Kasnikowski M./Orlikowski A. | Cuenin S./Gueymard Wayenburg S. | 1:2 (6:4, 3:6, 6:10) | details | 08.09.2021 |
| 1/16-finals | Ivanovski K./Lajal M. | Kasnikowski M./Orlikowski A. | 1:2 (3:6, 6:4, 3:10) | details | 06.09.2021 |
 Poland: M25 Grodzisk Mazowiecki - Doubles - Main |
|---|
| 1/8-finals | Juszczak P./Pavlasek A. | Kasnikowski M./Orlikowski A. | 2:1 (7:5, 4:6, 10:8) | details | 03.08.2021 |
 United Kingdom: Wimbledon - Doubles - Main |
|---|
| 1/16-finals | Florig P./Rehberg M. H. | Kasnikowski M./Orlikowski A. | 2:1 (2:6, 6:2, 10:4) | details | 07.07.2021 |
 France: French Open - Doubles - Main |
|---|
| Quarter-finals | Katz M./Samofalov G. | Kasnikowski M./Orlikowski A. | 2:1 (66:7, 6:4, 10:7) | details | 10.06.2021 |
| 1/8-finals | Kasnikowski M./Orlikowski A. | Andrejic M./Topo M. | 2:1 (7:5, 2:6, 10:2) | details | 09.06.2021 |
| 1/16-finals | Debru G./Ghibaudo A. | Kasnikowski M./Orlikowski A. | 0:2 (2:6, 4:6) | details | 08.06.2021 |
