Stadium: Court 4 Round: 45 Ground: Hardcourt outdoor
| Challenger Koblenz | 2019/01/15 09:00 | Peter Torebko v Kai Lemstra | 6-1,1-6,6-1 |
| ITF M15 Monastir | 2019/01/10 10:00 | Kai Lemstra v Jonathan Mridha | 1-6,6-3,2-6 |
| 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 Tunisia F44 | 2018/12/10 08:30 | Yan Bondarevskiy v Kristjan Tamm | 6-3,6-1 |
| ITF Tunisia F44 | 2018/12/08 08:00 | Vitalii Shcherba v Kristjan Tamm | 0-6,3-6 |
| ITF Tunisia F43 | 2018/12/06 08:00 | Kristjan Tamm v Evan Hoyt | 3-6,2-6 |
| ITF Tunisia F43 | 2018/12/05 10:10 | Kristjan Tamm v Erik Crepaldi | 7-6,6-3 |
| ITF Tunisia F43 | 2018/12/03 08:30 | Maikel Borg v Kristjan Tamm | 5-7,3-6 |
| ITF Tunisia F43 | 2018/12/02 08:00 | Himansu Sagar v Kristjan Tamm | 4-6,0-6 |
| ITF Tunisia F42 | 2018/11/28 08:00 | Kristjan Tamm v Moez Echargui | 3-6,2-6 |
| ITF Tunisia F42 | 2018/11/26 08:30 | David Jorda Sanchis v Kristjan Tamm | 4-6,4-6 |