Stadium: Court 1 Oberhaching Round: 25 Ground: Carpet indoor
| ITF Germany F13 | 2018/08/19 14:00 | Matthias Haim v Sven Lemstra | 6-2,6-1 |
| ITF Germany F12 | 2018/08/13 10:00 | Eduard Guell Bartrina v Sven Lemstra | 6-2,6-1 |
| ITF Germany F12 | 2018/08/12 13:00 | Sven Lemstra v Alexander Kuerschner | 6-2,7-5 |
| ITF Germany F12 | 2018/08/12 08:00 | Sven Lemstra v Pietro Pirolt | 6-2,6-3 |
| Challenger Ismaning Qual | 2017/10/14 15:05 | Sven Lemstra v Kai Lemstra | 2-6,0-6 |
| ITF Germany F14 | 2017/10/09 10:00 | Johannes Haerteis v Sven Lemstra | 6-3,6-1 |
| ITF Germany F14 | 2017/10/08 07:00 | Marcel Strickroth v Sven Lemstra | 6-0,1-6,3-6 |
| ITF Germany F14 | 2016/10/09 07:00 | Laurin Aerne v Sven Lemstra | 4-6,7-6,2-6 |
| ITF Germany F14 | 2018/10/01 10:00 | Michael Weindl v Sandro Kopp | 2-6,2-6 |
| ITF Netherlands F6 | 2018/08/30 14:15 | Nik Razborsek v Sandro Kopp | 6-1,6-1 |
| ITF Netherlands F6 | 2018/08/29 12:30 | Joris Bodin v Sandro Kopp | 6-3,4-6,1-6 |
| ITF Netherlands F5 | 2018/08/19 08:30 | Karlo Cubelic v Sandro Kopp | 2-6,7-5,6-3 |
| ITF Netherlands F5 | 2018/08/18 07:00 | Yannick Verwater v Sandro Kopp | 3-6,0-6 |
| ITF Austria F6 | 2018/08/06 11:30 | Sandro Kopp v Yuta Shimizu | 6-4,6-7,4-6 |
| ITF Austria F5 | 2018/08/01 08:00 | Alessandro Ceppellini v Sandro Kopp | 7-5,6-1 |
| ITF Austria F4 | 2018/07/23 13:30 | Jonas Trinker v Sandro Kopp | 6-3,2-6,6-0 |