Stadium: Center Court Round: 27 Ground: Hardcourt outdoor
| Challenger Istanbul MD | 2021/09/15 10:30 | Sancic/Sitak v Agabigun S / Altuna T | 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 | 차잘 M / 테사 L v Sancic/Sitak | 2-6,4-6 |
| Challenger St. Tropez MD | 2021/09/01 12:35 | Fabbiano/Masur v Sancic/Sitak | 6-7,2-6 |
| Challenger Luedenscheid MD | 2021/08/18 12:35 | Moeller/Sandkaulen v Sancic/Sitak | 6-1,6-2 |
| Challenger Meerbusch MD | 2021/08/13 15:00 | Sancic/Sitak v Brown/Haase | 4-6,4-6 |
| Challenger Meerbusch MD | 2021/08/12 11:50 | Molchanov D / Nedovyesov A v Sancic/Sitak | 6-7,5-7 |
| Challenger Istanbul MD | 2021/09/14 16:00 | Blancaneaux/Fabbiano v 두브리브니 아 / 티우르네브 에 | 6-3,6-4 |