Stadium: Court 4 Round: 25 Ground: Clay
| ITF Czech Republic F2 | 2018/05/22 08:00 | Kai Lemstra v Bart Van Den Berg | 3-6,3-6 |
| ITF M15 Kramsach | 2019/07/15 13:30 | Kai Lemstra v Evzen Holis | 6-3,4-6,10-6 |
| ITF M15 Troisdorf | 2019/05/06 14:00 | Mick Veldheer v Kai Lemstra | 2-6,6-1,10-7 |
| ITF M15 Sharm El Sheikh | 2019/03/21 08:00 | Enrico Dalla Valle v Kai Lemstra | 6-1,6-1 |
| ITF M15 Sharm El Sheikh | 2019/03/20 09:40 | Stefan Palosi v Kai Lemstra | 4-6,2-6 |
| ITF M15 Sharm El Sheikh | 2019/03/18 12:30 | Fabrizio Andaloro v Kai Lemstra | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2019/03/18 09:30 | Kai Lemstra v Dominik Nazaruk | 6-1,7-5 |
| ITF M15 Sharm El Sheikh | 2019/03/11 08:00 | Kai Lemstra v Kristjan Tamm | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2019/03/04 08:00 | George Tsivadze v Kai Lemstra | 2-6,6-4,10-3 |
| ITF M15 Marburg | 2019/07/10 15:50 | Bart Van Den Berg v Patrick Zahraj | 3-6,6-7 |
| ITF M15 Marburg | 2019/07/08 09:00 | Bart Van Den Berg v Adrian Oetzbach | 6-3,6-7,11-9 |
| ITF M15 Marburg | 2019/07/08 08:00 | Bart Van Den Berg v Lucas Hellfritsch | 6-1,7-6 |
| ITF M15 Den Haag | 2019/07/04 16:00 | Bart Van Den Berg v Igor Sijsling | 3-6,2-6 |
| ITF M15 Den Haag | 2019/07/03 09:05 | Bart Van Den Berg v Shalva Dzhanashia | 3-6,6-3,6-1 |
| ITF M15 Den Haag | 2019/07/02 10:30 | Bart Van Den Berg v Alec Deckers | 6-1,6-1 |
| ITF M15 Alkmaar | 2019/06/26 11:25 | Bart Van Den Berg v Guy Den Heijer | 2-6,7-5,2-6 |
| ITF M15 Majadahonda | 2019/05/30 08:00 | Jaume Pla Malfeito v Bart Van Den Berg | 7-5,6-3 |