Stadium: Court 1 Round: 26 Ground: Clay
| Challenger Braunschweig - MD | 2021/07/10 11:30 | Sabanov/Sabanov v Walkow/Zielinski | 4-6,6-4,4-10 |
| Challenger Braunschweig - MD | 2021/07/08 14:50 | Duran/Sandkaulen v Walkow/Zielinski | 5-7,4-6 |
| Challenger Braunschweig - MD | 2021/07/07 11:35 | Walkow/Zielinski v Cerretani/Zelenay | 6-3,6-4 |
| Challenger Milan - MD | 2021/06/25 16:25 | Brown/Weissborn v Walkow/Zielinski | 7-5,6-4 |
| Challenger Milan - MD | 2021/06/24 13:00 | Bonadio/Gabashvili v Walkow/Zielinski | 2-6,1-6 |
| Challenger Milan - MD | 2021/06/23 15:00 | Brancaccio/Zeppieri v Walkow/Zielinski | 6-7,4-6 |
| Challenger Aix en Provence - MD | 2021/06/18 15:40 | Walkow/Zielinski v Doumbia/Reboul | 6-7,4-6 |
| Challenger Aix en Provence - MD | 2021/06/17 09:00 | Walkow/Zielinski v Lamasine/Olivetti | 6-4,7-5 |
| ATP Bastad - MD | 2021/07/18 10:00 | Begemann/Olivetti v Arends/Pel | 4-6,2-6 |
| ATP Bastad - MD | 2021/07/17 14:05 | Cuevas/Martin v Arends/Pel | 6-2,5-7,7-10 |
| ATP Bastad - MD | 2021/07/15 12:15 | Arends/Pel v Goransson/Nielsen | 6-2,6-2 |
| ATP Bastad - MD | 2021/07/13 13:10 | Arends/Pel v Martinez/Sitak | 6-1,6-4 |
| ATP Marbella - MD | 2021/04/06 13:55 | Brkic/Cacic v Arends/Pel | 1-6,6-0,10-5 |
| Challenger Lille - MD | 2021/03/26 18:10 | Arends/Pel v Added/Geerts | 1-6,3-6 |
| Challenger Lille - MD | 2021/03/25 17:45 | Arends/Pel v Bourgue/Muller | 4-6,6-3,10-5 |
| ATP Marsylia - MD | 2021/03/14 10:45 | Glasspool/Heliovaara v Arends/Pel | 7-5,7-6 |