Stadium: Court 6 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Monastir | 2019/01/09 11:45 | Christian Seraphim v Kai Lemstra | 4-6,4-6 |
| ITF Czech Republic F12 | 2018/11/27 09:00 | Remy Bertola v Kai Lemstra | 6-4,6-3 |
| ITF Czech Republic F12 | 2018/11/26 09:00 | David Juras v Kai Lemstra | 6-4,3-6,6-7 |
| ITF Czech Republic F11 Qual | 2018/11/19 11:00 | Wojciech Marek v Kai Lemstra | 3-6,6-3,7-5 |
| Challenger Eckental | 2018/10/27 17:00 | Kai Lemstra v Jan Satral | 5-7,1-6 |
| ITF Czech Republic F7 | 2018/10/23 11:10 | Kai Lemstra v Piotr Grynkowski | 4-6,6-1,4-6 |
| ITF Czech Republic F7 | 2018/10/22 14:00 | Kai Lemstra v Vitek Horak | 6-3,6-2 |
| Challenger Ismaning | 2018/10/16 15:25 | Gregoire Barrere v Kai Lemstra | 7-6,6-3 |
| ITF M15 Monastir | 2019/01/09 11:05 | Filip Cristian Jianu v Jonathan Mridha | 5-7,3-6 |
| ITF Sweden F5 | 2018/10/05 14:30 | Patrik Niklas-Salminen v Jonathan Mridha | 7-6,6-4 |
| ITF Sweden F5 | 2018/10/04 13:35 | Markus Eriksson v Jonathan Mridha | 7-5,3-6,4-6 |
| ITF Sweden F5 | 2018/10/03 15:45 | Jonathan Mridha v Liam Caruana | 7-6,6-0 |
| ITF Sweden F5 | 2018/10/01 13:00 | George Loffhagen v Jonathan Mridha | 6-2,6-7,4-6 |
| ITF Sweden F4 | 2018/09/26 12:50 | Jonathan Mridha v Markus Eriksson | 6-4,4-6,5-7 |
| ITF Sweden F4 | 2018/09/25 14:50 | Jonathan Stenberg v Jonathan Mridha | 2-6,3-6 |
| Davis Cup | 2018/09/16 13:45 | Sandro Ehrat v Jonathan Mridha | 6-4,3-6,4-6,6-7 |