Stadium: Court 1 Round: 26 Ground: Hardcourt outdoor
| Challenger Aix en Provence MD | 2021/06/18 15:40 | Walkow/Zielinski v Doumbia/Reboul | 6-7,4-6 |
| Challenger Split MD | 2021/04/07 12:40 | Doumbia/Reboul v Walkow/Zielinski | 3-6,2-6 |
| Challenger Seville MD | 2021/09/08 09:00 | Doumbia/Reboul v Sanchez Jover/Vidal Azorin | 7-5,6-3 |
| Challenger Como MD | 2021/09/01 11:25 | Kestelboim/Carabelli v Doumbia/Reboul | 6-4,7-6 |
| Challenger Barletta MD | 2021/08/26 14:45 | Bortolotti/Rodriguez v Doumbia/Reboul | 6-7,6-3,16-14 |
| Challenger Barletta MD | 2021/08/25 16:00 | Mejia/Quiroz v Doumbia/Reboul | 4-6,3-6 |
| Challenger Verona MD | 2021/08/21 16:00 | Margaroli/Oliveira v Doumbia/Reboul | 5-7,6-4,6-10 |
| Challenger Verona MD | 2021/08/20 14:20 | Doumbia/Reboul v King/Schnur | 6-3,7-6 |
| Challenger Verona MD | 2021/08/19 11:00 | Roveri Sidney/Zormann v Doumbia/Reboul | 3-6,2-6 |
| Challenger Verona MD | 2021/08/17 16:15 | Kotov/Tseng v Doumbia/Reboul | 7-5,1-6,8-10 |
| Challenger Meerbusch MD | 2021/08/14 15:00 | Brown/Haase v Walkow/Zielinski | 3-6,1-6 |
| Challenger Meerbusch MD | 2021/08/13 09:00 | de Jong/Stevens v Walkow/Zielinski | 2-6,7-6,9-11 |
| Challenger Meerbusch MD | 2021/08/12 10:00 | Walkow/Zielinski v Sabanov/Sabanov | 7-6,6-4 |
| Challenger Meerbusch MD | 2021/08/11 13:00 | Ficovich/Kicker v Walkow/Zielinski | 3-6,2-6 |
| Challenger Poznan MD | 2021/07/29 16:25 | Gonzales/Johnson v Walkow/Zielinski | 2-6,7-6,13-11 |
| Challenger Poznan MD | 2021/07/28 14:10 | Domingues/Elias v Walkow/Zielinski | 2-6,2-6 |
| ATP Gstaad MD | 2021/07/25 11:20 | Huesler/Stricker v Walkow/Zielinski | 6-1,7-6 |
| ATP Gstaad MD | 2021/07/23 10:45 | Paul/Riedi v Walkow/Zielinski | 6-4,6-7,2-10 |