Stadium: Court 4 Round: 25 Ground: Hardcourt indoor
| ITF M25 The Hague | 2021/06/29 11:20 | Lucas Gerch v Vladimir Ivanov | 6-1,6-2 |
| 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 | Vladimir Ivanov v Patrick Zahraj | 4-6,6-3,10-6 |
| ITF M25 Alkmaar | 2021/06/21 18:00 | Vladimir Ivanov v Guy Den Heijer | 3-6,6-7 |
| ITF M25 Alkmaar | 2021/06/20 14:00 | Vladimir Ivanov v Jack Gibbens | 6-2,7-5 |
| ITF M15 Helsinki | 2021/06/02 06:30 | Lucas Catarina v Vladimir Ivanov | 7-5,1-6,6-2 |
| ITF M15 Kouvola | 2021/05/26 08:00 | Vladimir Ivanov v Lorenzo Rottoli | 2-6,4-6 |
| ITF M15 Antalya | 2021/05/19 11:10 | Vladimir Ivanov v Edoardo Eremin | 3-6,4-6 |
| ITF M25 Marburg | 2021/07/09 12:00 | Ryan Nijboer v Milan Welte | 4-6,6-3,6-1 |
| ITF M25 Marburg | 2021/07/08 08:55 | Milan Welte v Neo Niedner | 6-2,6-1 |
| ITF M25 Marburg | 2021/07/07 12:30 | Daniel Cukierman v Milan Welte | 4-6,4-6 |
| ITF M25 Marburg | 2021/07/06 15:00 | Milan Welte v Raphael Collignon | 7-6,6-3 |
| 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 |