Stadium: S+S Court Round: 54 Ground: Clay
| ITF M25 Marburg | 2021/07/05 13:05 | Milan Welte v Christopher Patzanovsky | 6-1,6-3 |
| ITF M15 Heraklion | 2021/05/17 07:00 | Milan Welte v Tom Gentzsch | 6-0,6-3 |
| ITF M15 Troisdorf | 2021/05/09 13:00 | Yannik Steinegger v Milan Welte | 6-4,6-2 |
| ITF M25 Meerbusch | 2021/04/16 09:00 | Milan Welte v Alexander Erler | 1-6,4-6 |
| ITF M25 Meerbusch | 2021/04/15 10:00 | Markus Eriksson v Milan Welte | 3-6,1-6 |
| ITF M25 Meerbusch | 2021/04/14 12:15 | Milan Welte v Pietro Rondoni | 6-3,4-6,6-4 |
| ITF M25 Meerbusch | 2021/04/13 13:30 | Mats Rosenkranz v Milan Welte | 2-6,2-6 |
| ITF M25 Meerbusch | 2021/04/12 11:00 | Hendrik Jebens v Milan Welte | 5-7,1-6 |
| ITF M25 Marburg | 2021/07/05 12:25 | Jing L Weng v Raphael Collignon | 2-6,6-3,8-10 |
| ITF M25 The Hague | 2021/06/30 12:15 | Raphael Collignon v Christopher Heyman | 1-6,7-6,3-6 |
| ITF M25 The Hague | 2021/06/28 08:00 | Vladimir Ivanov v Raphael Collignon | 6-2,6-2 |
| ITF M25 The Hague | 2021/06/27 08:00 | Aloys J W Van Baal v Raphael Collignon | 4-6,3-6 |
| ITF M15 Antalya | 2021/05/09 07:00 | Vladislav Melnic v Raphael Collignon | 5-7,6-3,10-5 |
| ITF M15 Monastir | 2021/03/24 10:35 | Gilbert S K Junior v Raphael Collignon | 3-6,6-4,6-4 |
| ITF M15 Monastir | 2021/03/21 13:00 | Gauthier Onclin v Raphael Collignon | 6-1,6-1 |
| ITF M15 Monastir | 2021/03/20 14:15 | Igor Marcondes v Raphael Collignon | 6-1,6-7,4-6 |