Stadium: Court 23 Round: 54 Ground: Clay
| USA F34, Singles | 2018/11/25 16:00 | Sinn, Maximilian v Frantzen, Constantin | 4-6,3-6 |
| USA F34, Singles | 2018/11/24 18:30 | Li, Chenhe v Sinn, Maximilian | 4-6,4-6 |
| ITF USA F32 | 2018/11/09 17:00 | Sinn, Maximilian v Joseph Corse | 2-6,1-6 |
| ITF Germany F11 | 2018/08/05 08:00 | Guell Bartrina, Eduard v Sinn, Maximilian | 6-0,6-0 |
| ITF USA F37 | 2017/11/10 17:00 | Bryde, Trent v Sinn, Maximilian | 7-5,6-1 |
| ITF Germany F10 | 2017/08/06 08:00 | Sinn, Maximilian v von Hindte, Leonard | 1-6,3-6 |
| ITF Germany F8 Qual | 2017/07/16 08:30 | Kapshuk, Artem v Sinn, Maximilian | 6-1,6-1 |
| ITF USA F32 Qual | 2014/11/15 16:00 | Kessler, Mcclain v Sinn, Maximilian | 6-2,6-3 |
| ITF USA F28B | 2018/10/21 15:00 | Bradley, Julian v Keist, Luca | 6-3,6-0 |
| ITF Switzerland F3 | 2018/08/22 09:30 | Johan Nikles v Keist, Luca | 6-3,6-1 |
| ITF Switzerland F3 | 2018/08/20 08:40 | Eckert, Gilles v Keist, Luca | 1-6,1-6 |
| ITF Switzerland F3 | 2018/08/19 11:00 | Keist, Luca v Yannik Steinegger | 6-4,3-6,6-3 |
| ITF Morocco F2 | 2018/07/22 09:00 | Krivic, Ivan v Keist, Luca | 7-6,6-3 |
| ITF Morocco F2 | 2018/07/21 09:30 | Keist, Luca v Glebov, Viacheslav | 6-0,6-0 |
| ITF Morocco F1 | 2018/07/14 13:30 | Keist, Luca v Quentin Folliot | 3-6,1-6 |
| ITF Israel F11 | 2018/06/27 09:05 | Keist, Luca v Hank, Tigre | 2-6,1-6 |