Stadium: Court 3 Round: 25 Ground: Carpet indoor
| ITF M15 Anif | 2020/08/23 12:00 | Kirill Kivattsev v Kai Lemstra | 6-7,3-6 |
| ITF M15 Cadolzburg | 2024/01/17 09:55 | Kai Lemstra v Vincent Marysko | 6-7,4-6 |
| Saksamaa meistrivõistlused | 2023/12/08 14:10 | Kai Lemstra v Max Hans Rehberg | 3-6,4-6 |
| Saksamaa meistrivõistlused | 2023/12/07 13:00 | Kai Lemstra v Edison Ambarzumjan | 6-3,6-1 |
| Saksamaa meistrivõistlused | 2023/12/06 12:20 | Kai Lemstra v Noel Larwig | 6-2,6-4 |
| ITF M15 Irákleio | 2023/11/24 08:00 | Alastair Gray v Kai Lemstra | 6-3,7-5 |
| ITF M15 Irákleio | 2023/11/22 12:25 | Alexandros Skorilas v Kai Lemstra | 6-7,1-6 |
| ITF M15 Irákleio | 2023/11/16 08:00 | Kai Lemstra v Jakub Nicod | 6-7,6-1,3-6 |
| ITF M15 Irákleio | 2023/11/14 08:30 | Kai Lemstra v Nikolay Nedelchev | 3-6,6-4,6-1 |
| ITF M15 Cadolzburg | 2024/01/19 11:00 | Michael Agwi v Kirill Kivattsev | 7-6,7-5 |
| ITF M15 Cadolzburg | 2024/01/18 10:00 | Tim Ruehl v Kirill Kivattsev | 2-6,5-7 |
| ITF M15 Cadolzburg | 2024/01/17 12:30 | Florian Broska v Kirill Kivattsev | 3-6,5-7 |
| ITF M15 Monastir | 2023/12/14 12:15 | Fabien Salle v Kirill Kivattsev | 7-6,5-7,6-2 |
| ITF M15 Monastir | 2023/12/12 13:45 | Sean Cuenin v Kirill Kivattsev | 3-6,6-7 |
| ITF M15 Monastir | 2023/12/09 11:00 | Kirill Kivattsev v Jakub Paul | 2-6,4-6 |
| ITF M15 Monastir | 2023/12/08 09:00 | Omni Kumar v Kirill Kivattsev | 4-6,4-6 |
| ITF M15 Monastir | 2023/12/07 11:30 | Christoph Negritu v Kirill Kivattsev | 6-7,3-6 |