 USA: US Open - Doubles - Main |
|---|
| 1/8-finals | Coleman E./Sieg M. | Marcinko P./Szabanin N. | 2:0 (6:4, 6:4) | details | 08.09.2021 |
 France: French Open - Doubles - Main |
|---|
| Quarter-finals | Eala A./Selekhmeteva O. | Marcinko P./Szabanin N. | 2:0 (7:67, 7:65) | details | 10.06.2021 |
| 1/8-finals | Palicova B./Xu A. | Marcinko P./Szabanin N. | 0:2 (3:6, 65:7) | details | 09.06.2021 |
| 1/16-finals | Montgomery R./Ngounoue C. | Marcinko P./Szabanin N. | 1:2 (63:7, 6:2, 10:12) | details | 07.06.2021 |
 Croatia: W15 Sibenik 2 - Doubles - Main |
|---|
| Final | Marcinko P./Szabanin N. | Berberovic N./Fossa N. | 2:1 (6:4, 3:6, 10:4) | details | 29.05.2021 |
| Semi-finals | Marcinko P./Szabanin N. | Chiesa E./Rossi F. | 2:0 (7:65, 6:4) | details | 28.05.2021 |
| Quarter-finals | Jeanjean L./Marinkovic B. | Marcinko P./Szabanin N. | 0:2 (2:6, 2:6) | details | 27.05.2021 |
| 1/8-finals | Marcinko P./Szabanin N. | Bubalo E./Ciric Bagaric L. | 2:0 (7:5, 6:0) | details | 25.05.2021 |
| Croatia: W15 Sibenik - Doubles - Main |
|---|
| Final | Astakhova D./Makarova E. | Marcinko P./Szabanin N. | 0:2 (4:6, 3:6) | details | 22.05.2021 |
| Semi-finals | Marcinko P./Szabanin N. | Drazic M./Herdzelas D. | 2:1 (2:6, 7:63, 10:4) | details | 21.05.2021 |
| Quarter-finals | Marcinko P./Szabanin N. | Lovric P./Wargnier L. | 2:1 (67:7, 6:1, 10:1) | details | 20.05.2021 |
| 1/8-finals | Chiesa E./Rossi F. | Marcinko P./Szabanin N. | 1:2 (0:6, 7:66, 7:10) | details | 18.05.2021 |
