Stadium: Court 5 Round: 62 Ground: Hardcourt outdoor
| TennisDirect NK Tennis | 2021/12/17 10:30 | Botic Van De Zandschulp v Guy Den Heijer | 6-3,6-3 |
| UTR Pro Tennis Series Amsterdam | 2021/12/12 08:30 | Guy Den Heijer v Max Houkes | 6-3,1-6,6-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/11 10:00 | Guy Den Heijer v Deney Wassermann | 6-7,7-6,1-0 |
| UTR Pro Tennis Series Amsterdam | 2021/12/10 08:25 | Rob Van Den Berg v Guy Den Heijer | 3-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/09 11:50 | Jip Van Assendelft v Guy Den Heijer | 2-6,2-6 |
| UTR Pro Tennis Series Amsterdam | 2021/12/08 10:00 | Michiel de Krom v Guy Den Heijer | 3-6,3-5 |
| UTR Pro Tennis Series Amsterdam | 2021/12/06 07:00 | Jannis Kahlke v Guy Den Heijer | 7-6,5-7,3-5 |
| ITF M15 Heraklion | 2021/11/24 08:55 | Guy Den Heijer v Arthur Fery | 6-7,2-6 |
| ITF M15 Antalya | 2021/12/12 06:30 | Sven Corbinais v Svyatoslav Gulin | 3-6,2-6 |
| ITF M15 Antalya | 2021/12/08 07:00 | Gheorghe Claudiu Schinteie v Sven Corbinais | 6-2,6-3 |
| ITF M15 Antalya | 2021/12/06 12:30 | Sven Corbinais v Credit Chaiyarin | 1-6,6-4,10-8 |
| ITF M15 Antalya | 2021/10/25 11:15 | Egor Novikov v Sven Corbinais | 6-4,6-4 |
| ITF M15 Antalya | 2021/10/24 07:00 | Andrea Del Federico v Sven Corbinais | 6-0,4-6,7-10 |
| ITF M15 Antalya | 2021/10/17 07:00 | Denis Klok v Sven Corbinais | 6-4,6-4 |
| ITF M15 Antalya | 2021/10/11 07:00 | Gabriel Ciro Da Silva v Sven Corbinais | 4-6,6-1,10-2 |
| ITF M15 Antalya | 2021/10/10 07:00 | Sven Corbinais v Doruk Turknas | 6-0,7-5 |