| 15.12.21 | 1-a rundă | Sadio Doumbia/Fabien Reboul | Mats Hermans/Glenn Smits | 6-3, 7-5 |  | detaliu meci | Maia 2 | Zgura |
| 13.10.21 | 1-a rundă | Jay Clarke/Arjun Kadhe | Mats Hermans/Glenn Smits | 6-3, 7-66 |  | detaliu meci | Napoli 2 | Zgura |
| 16.09.21 | Sfert de finală | Bart Stevens/Tim Van Rijthoven | Mats Hermans/Glenn Smits | 6-3, 6-2 |  | detaliu meci | Rennes Challenger | In. Hard |
| 15.09.21 | 1-a rundă | Mats Hermans/Glenn Smits | Anirudh Chandrasekar/Davide Pozzi | 6-1, 6-3 |  | detaliu meci |
| 15.07.21 | Sfert de finală | Mark Vervoort/Federico Zeballos | Mats Hermans/Glenn Smits | 5-7, 7-5, 10-8 |  | detaliu meci | Todi Challenger | Zgura |
| 14.07.21 | 1-a rundă | Mats Hermans/Glenn Smits | Matheus Pucinelli De Almeida/Pedro Sakamoto | 7-65, 7-5 |  | detaliu meci |
| 25.06.21 | Sfert de finală | Jesper De Jong/Sander Jong | Mats Hermans/Glenn Smits | 7-64, 6-1 |  | detaliu meci | M25 Alkmaar | Zgura |
| 22.06.21 | 1-a rundă | Mats Hermans/Glenn Smits | Michiel De Krom/Guy Den Heijer | 6-78, 6-3, 10-5 |  | detaliu meci |
| 14.05.21 | Semifinală | Juan Ignacio Galarza/Juan Pablo Paz | Mats Hermans/Glenn Smits | 6-3, 3-6, 10-4 |  | detaliu meci | M15 Troisdorf | Zgura |
| 13.05.21 | Sfert de finală | Mats Hermans/Glenn Smits | Remy Bertola/Tomas Lipovsek Puches | 7-63, 6-4 |  | detaliu meci |
| 11.05.21 | 1-a rundă | Mats Hermans/Glenn Smits | Osman Torski/Max Wiskandt | 6-2, 7-65 |  | detaliu meci |