Stadium: Court 1 Round: 27 Ground: Hardcourt indoor
| ATP Belgrade MD | 2021/05/24 16:00 | Behar/Escobar v Arends/Martinez | 7-5,6-7,4-10 |
| ATP Belgrade MD | 2021/05/24 12:00 | Erlich/Vasilevski v Molteni/Nielsen | 6-4,4-6,10-3 |
| Challenger Belgrade MD | 2021/04/16 15:20 | Erlich/Vasilevski v Duran/Molteni | 6-3,5-7,9-11 |
| Challenger Belgrade MD | 2021/04/15 14:40 | Erlich/Vasilevski v Sitak/Vega Hernandez | 6-1,6-1 |
| Challenger Belgrade MD | 2021/04/14 12:35 | Gonzalez/Sharan v Erlich/Vasilevski | 3-6,3-6 |
| ATP Marbella MD | 2021/04/07 13:30 | Erlich/Vasilevski v Arevalo/Middelkoop | 4-6,6-7 |
| ATP Doha MD | 2021/03/09 15:30 | Chardy/Martin v Erlich/Vasilevski | 6-2,6-2 |
| ATP Montpellier MD | 2021/02/28 10:30 | Kontinen/Roger-Vasselin v Erlich/Vasilevski | 6-2,7-5 |
| ATP Montpellier MD | 2021/02/26 11:00 | Erlich/Vasilevski v Lammons/Withrow | 7-6,6-4 |