Stadium: Court 2 Round: 28 Ground: Clay
| Challenger Losinj - MD | 2021/10/21 13:10 | Cornea/Kirkin v Blancaneaux/Kadhe | 6-3,1-6,10-4 |
| Challenger Losinj - MD | 2021/10/20 10:55 | Fatic/Setkic v Cornea/Kirkin | 1-6,2-6 |
| Challenger Losinj - MD | 2021/10/21 14:40 | Haase/Hermans v Sancic/Sitak | 5-7,4-6 |
| Challenger Losinj - MD | 2021/10/20 14:50 | Alvarez Varona/Kravchenko v Sancic/Sitak | 6-7,1-6 |
| Challenger Alicante - MD | 2021/10/12 14:45 | Sancic/Sitak v Nava/Verdasco | 3-6,6-4,6-10 |
| 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 |