Stadium: Court 2 Round: 26 Ground: Clay
| Challenger Bratislava MD | 2021/06/12 10:30 | Molchanov/Nedovyesov v Arends/Martinez | 7-6,6-1 |
| Challenger Bratislava MD | 2021/06/11 11:30 | Jaziri/Rola v Arends/Martinez | 4-6,1-6 |
| Challenger Bratislava MD | 2021/06/10 15:25 | Horansky/Karol v Arends/Martinez | 2-6,6-7 |
| ATP Belgrade MD | 2021/05/25 15:20 | Arends/Martinez v Erlich/Vasilevski | 3-6,6-0,6-10 |
| ATP Belgrade MD | 2021/05/24 16:00 | Behar/Escobar v Arends/Martinez | 7-5,6-7,4-10 |