Stadium: Pista Central Round: 26 Ground: Hardcourt outdoor
| ATP San Diego - MD | 2021/09/30 01:20 | Sancic/Sitak v Thompson/Withrow | 3-6,4-6 |
| Challenger Istanbul - MD | 2021/09/18 13:20 | Sancic/Sitak v Albot/Cozbinov | 6-4,5-7,9-11 |
| Challenger Istanbul - MD | 2021/09/17 11:15 | Sancic/Sitak v Gonzales/Johnson | 4-6,6-2,10-5 |
| Challenger Istanbul - MD | 2021/09/16 13:30 | Sancic/Sitak v Blancaneaux/Fabbiano | 6-0,6-7,13-11 |
| Challenger Istanbul - MD | 2021/09/15 10:30 | Sancic/Sitak v Agabigun/Altuna | 6-2,6-3 |
| Challenger St. Tropez - MD | 2021/09/04 16:25 | Arneodo/Guinard v Sancic/Sitak | 6-7,4-6 |
| Challenger St. Tropez - MD | 2021/09/04 14:45 | Grenier/Muller v Sancic/Sitak | 2-6,6-3,5-10 |
| Challenger St. Tropez - MD | 2021/09/02 15:10 | Chazal/Tessa v Sancic/Sitak | 2-6,4-6 |