Stadium: Court 2 Round: 25 Ground: Clay
| ITF M25 Telfs | 2021/07/18 13:20 | Filip Misolic v Kirill Kivattsev | 6-2,6-4 |
| ITF M25 Telfs | 2021/07/18 08:00 | Kirill Kivattsev v Alex M Pujolras | 6-3,6-1 |
| ITF M25 Telfs | 2021/07/16 10:00 | Kirill Kivattsev v Ondrej Horak | 6-2,6-2 |
| ITF M25 Telfs | 2021/07/13 09:00 | Danylo Kalenichenko v Kirill Kivattsev | 4-6,3-6 |
| ITF M25 Marburg | 2021/07/05 09:30 | Kirill Kivattsev v Andres Gabriel Ciurletti | 6-7,6-7 |
| ITF M15 Bergamo | 2021/06/22 11:40 | Federico Arnaboldi v Kirill Kivattsev | 6-4,6-2 |
| ITF M15 Bergamo | 2021/06/21 09:55 | Matvey Minin v Kirill Kivattsev | 2-6,4-6 |
| ITF M15 Genova | 2021/06/15 12:15 | Kirill Kivattsev v Tomas Jirousek | 7-6,6-4 |
| ITF M25 Telfs | 2021/07/16 08:50 | Bogdan Ionut Apostol v Mick Veldheer | 6-4,5-7,7-5 |
| ITF M25 Telfs | 2021/07/13 09:20 | Mick Veldheer v Alibek Kachmazov | 6-4,6-0 |
| ITF M25 The Hague | 2021/06/28 10:05 | Mick Veldheer v Sidane Pontjodikromo | 5-7,3-6 |
| ITF M25 The Hague | 2021/06/27 08:00 | Mick Veldheer v Jarno Jans | 6-4,6-1 |
| ITF M25 Klosters | 2021/06/25 08:55 | Dominic Stephan Stricker v Mick Veldheer | 6-2,6-0 |
| ITF M25 Klosters | 2021/06/24 06:55 | Mick Veldheer v Sandro Ehrat | 6-3,5-7,6-3 |
| ITF M25 Klosters | 2021/06/22 09:45 | Mick Veldheer v Damien Wenger | 1-6,6-2,6-4 |
| ITF M15 Antalya | 2021/05/19 08:50 | Davide Galoppini v Mick Veldheer | 7-5,7-5 |