Stadium: Platz 3 Round: 26
| German Championship | 2023/12/06 12:20 | Kai Lemstra v Noel Larwig | 6-2,6-4 |
| ITF M15 - Heraklion | 2023/11/24 08:00 | Alastair Gray v Kai Lemstra | 6-3,7-5 |
| ITF M15 - Heraklion | 2023/11/22 12:25 | Alexandros Skorilas v Kai Lemstra | 6-7,1-6 |
| ITF M15 - Heraklion | 2023/11/16 08:00 | Kai Lemstra v Jakub Nicod | 6-7,6-1,3-6 |
| ITF M15 - Heraklion | 2023/11/14 08:30 | Kai Lemstra v Nikolay Nedelchev | 3-6,6-4,6-1 |
| ITF M15 - Selva Gardena | 2023/11/01 12:05 | Kai Lemstra v Hynek Barton | 4-6,4-6 |
| ITF M15 - Selva Gardena | 2023/10/30 13:20 | Massimo Giunta v Kai Lemstra | 2-6,4-6 |
| ITF M15 - Bad Waltersdorf | 2023/10/05 07:30 | Kai Lemstra v Vlad Andrei Dancu | 1-6,1-6 |
| German Championship | 2023/12/06 13:00 | Edison Ambarzumjan v Vincent Dullinger | 3-6,7-6,7-5 |
| ITF M15 - Catania | 2023/11/28 11:00 | Alessandro Ingarao v Edison Ambarzumjan | 6-3,6-2 |
| ITF M15 - Catania | 2023/11/27 09:00 | Edison Ambarzumjan v Noah Perfetti | 6-0,6-1 |
| UTR Pro - Nimes | 2023/10/29 07:00 | Jean Karim Olivier De Sardan v Edison Ambarzumjan | 4-6,0-6 |
| UTR Pro - Nimes | 2023/10/28 07:30 | Hugo Cardinaud v Edison Ambarzumjan | 4-6,6-7 |
| UTR Pro - Nimes | 2023/10/27 08:14 | Edison Ambarzumjan v Mathis Epee | 1-6,6-7 |
| UTR Pro - Nimes | 2023/10/25 10:30 | Edison Ambarzumjan v Thibault Verdier | 6-2,6-4 |
| UTR Pro - Nimes | 2023/10/24 10:51 | Edison Ambarzumjan v Valentin Lapalu | 4-6,1-6 |