Stadium: Center Court Round: 26 Ground: Clay
| ITF M15 Antalya | 2021/04/29 11:45 | Christopher Heyman v Mats Rosenkranz | 4-6,6-4,7-5 |
| ITF M25 Barnstaple | 2020/02/12 11:45 | Mats Rosenkranz v Christopher Heyman | 5-7,3-6 |
| ITF Belgium F10 | 2017/08/23 13:00 | Mats Rosenkranz v Christopher Heyman | 0-6,1-6 |
| ITF M25 Marburg | 2021/07/07 14:55 | Christopher Heyman v Henri Squire | 5-7,3-6 |
| ITF M25 The Hague | 2021/07/02 14:30 | Jelle Sels v Christopher Heyman | 6-3,6-0 |
| ITF M25 The Hague | 2021/07/01 11:40 | Christopher Heyman v Jesper De Jong | 6-4,7-5 |
| ITF M25 The Hague | 2021/06/30 12:15 | Raphael Collignon v Christopher Heyman | 1-6,7-6,3-6 |
| ITF M25 Alkmaar | 2021/06/26 13:35 | Nicolas Alvarez Varona v Christopher Heyman | 6-4,3-6,7-6 |
| ITF M25 Alkmaar | 2021/06/25 11:45 | Christopher Heyman v Gijs Brouwer | 6-4,6-4 |
| ITF M25 Alkmaar | 2021/06/24 09:00 | Kaichi Uchida v Christopher Heyman | 2-6,6-3,6-7 |
| ITF M25 Alkmaar | 2021/06/22 09:00 | Christopher Heyman v Alexander Shevchenko | 7-6,6-2 |
| ATP Hamburg | 2021/07/10 09:00 | Thiago Seyboth Wild v Mats Rosenkranz | 6-3,6-1 |
| Challenger Braunschweig | 2021/07/06 09:00 | Mats Rosenkranz v Henri Laaksonen | 3-6,2-6 |
| Challenger Braunschweig | 2021/07/05 12:55 | Benjamin Hassan v Mats Rosenkranz | 2-6,2-6 |
| Challenger Braunschweig | 2021/07/04 11:10 | Mats Rosenkranz v Facundo Diaz Acosta | 3-6,7-6,7-6 |
| ITF M25 Alkmaar | 2021/06/24 08:00 | Mats Rosenkranz v Kai Wehnelt | 6-1,4-6,5-7 |
| ITF M25 Alkmaar | 2021/06/23 09:00 | Hernan Casanova v Mats Rosenkranz | 4-6,6-7 |
| ITF M25 Alkmaar | 2021/06/21 17:10 | Mats Rosenkranz v Herman Meeuwes Mattheo Knoop | 6-2,6-3 |
| ITF M25 Alkmaar | 2021/06/21 16:00 | Mats Rosenkranz v Herman M M Knoop | 6-2,6-3 |