Stadium: Center Court Round: 45 Ground: Carpet indoor
| Challenger Tashkent | 2018/10/08 05:30 | Felix Auger Aliassime v Tristan Lamasine | 7-6,6-2 |
| Challenger Tashkent | 2018/10/07 05:00 | Sergey Fomin v Tristan Lamasine | 3-6,4-6 |
| Challenger Tashkent | 2018/10/06 05:00 | Saida'lo Saidkarimov v Tristan Lamasine | 4-6,3-6 |
| Challenger Almaty 2 | 2018/09/29 04:00 | Tristan Lamasine v Luca Margaroli | 6-3,3-6,4-6 |
| Challenger Kaohsiung | 2018/09/17 04:15 | Yunseong Chung v Tristan Lamasine | 6-4,6-2 |
| Challenger Kaohsiung | 2018/09/16 08:25 | Tristan Lamasine v Bradley Mousley | 6-3,7-5 |
| Challenger Kaohsiung | 2018/09/15 10:35 | Jacopo Berrettini v Tristan Lamasine | 2-6,5-7 |
| Challenger - Shanghai | 2018/09/13 04:55 | Tristan Lamasine v Miomir Kecmanovic | 4-6,3-6 |
| ITF Germany F14 | 2018/10/03 11:40 | Sven Lemstra v Sandro Kopp | 7-5,4-6,1-6 |
| 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 |