Stadium: Court 1 Round: 27 Ground: Clay
| Challenger Szczecin MD | 2021/09/14 16:30 | De Jong/Sachko v Daniel/Monteiro | 3-6,6-2,10-7 |
| Challenger Almaty MD | 2021/06/12 08:35 | Manafov/Tiurnev v De Jong/Sachko | 6-7,1-6 |
| Challenger Almaty MD | 2021/06/11 09:20 | De Jong/Sachko v Barrios-Vera/Bonadio | 6-2,6-0 |
| Challenger Almaty MD | 2021/06/10 08:10 | Menendez-Maceiras/Ortega-Olmedo v De Jong/Sachko | 1-6,2-6 |
| Challenger Almaty MD | 2021/06/09 07:20 | Gabashvili/Giustino v De Jong/Sachko | 3-6,4-6 |
| ITF M25 Prague MD | 2021/05/11 14:30 | Siniakov/Svrcina v De Jong/Sachko | 6-4,2-6,10-7 |
| Challenger Szczecin MD | 2021/09/16 10:00 | Pellegrino/Travaglia v Sabanov/Sabanov | 2-6,2-6 |
| Challenger Banja Luka MD | 2021/09/11 16:00 | Sabanov/Sabanov v Sancic/Serdarusic | 3-6,3-6 |
| Challenger Banja Luka MD | 2021/09/10 13:05 | Sabanov/Sabanov v Kolar/Sachko | 2-6,6-3,10-6 |
| Challenger Banja Luka MD | 2021/09/09 11:00 | Sabanov/Sabanov v Jecan/Tomescu | 6-3,6-3 |
| Challenger Banja Luka MD | 2021/09/08 09:30 | Sabanov/Sabanov v Tadic/Topo | 6-2,6-2 |
| Challenger Como MD | 2021/09/01 08:00 | Sabanov/Sabanov v Bortolotti/Cuevas | 7-5,2-6,7-10 |
| Challenger Luedenscheid MD | 2021/08/21 11:05 | Molchanov/Nedovyesov v Sabanov/Sabanov | 4-6,6-2,10-12 |
| Challenger Luedenscheid MD | 2021/08/20 16:40 | Sabanov/Sabanov v Verdugo/Reyes-Varela | 6-2,3-6,10-6 |