Stadium: Court 4 Round: 54 Ground: Carpet indoor
| ITF USA F39 Qual | 2017/11/25 19:00 | Charley Emhardt v Patrick Kawka | 2-6,1-6 |
| ITF USA F34 Qual | 2017/10/14 16:00 | Charley Emhardt v Jonathan Chang | 2-6,3-6 |
| ITF USA F31 | 2017/09/16 18:45 | Sebastian Hawken v Charley Emhardt | 7-5,7-5 |
| ITF Canada F5 | 2017/08/27 16:00 | Tyler Mercier v Charley Emhardt | 6-2,3-6,6-3 |
| ITF Canada F5 | 2017/08/26 17:30 | Charley Emhardt v Joseph W. Van Meter | 6-7,6-3,6-2 |
| ITF USA F27 Qual | 2017/08/06 16:00 | Charley Emhardt v Austin Hussey | 2-6,3-6 |
| ITF USA F25 Qual | 2017/07/23 13:30 | Jonathan Chang v Charley Emhardt | 6-2,6-1 |
| ITF USA F25 Qual | 2017/07/22 14:30 | Charley Emhardt v Justin Lunn | 6-7,7-5,6-1 |
| ITF Germany F2 | 2018/01/23 15:35 | Kai Lemstra v Pedro Cachin | 3-6,3-6 |
| ITF Germany F1 | 2018/01/11 17:10 | Elmar Ejupovic v Kai Lemstra | 6-3,6-4 |
| ITF Germany F1 | 2018/01/10 11:45 | Stefan Seifert v Kai Lemstra | 6-2,6-7,4-6 |
| ITF Germany F1 | 2018/01/08 12:30 | Karlo Cubelic v Kai Lemstra | 6-4,2-6,4-6 |
| ITF Germany F1 | 2018/01/07 11:30 | Tim Heger v Kai Lemstra | 4-6,4-6 |
| Challenger Eckental Qual | 2017/10/28 13:30 | Benjamin Hassan v Kai Lemstra | 7-5,7-6 |
| ITF Germany F16 | 2017/10/22 08:00 | Kai Lemstra v Tim Seibert | 3-6,1-6 |
| Challenger Ismaning Qual | 2017/10/15 12:20 | Kai Lemstra v Farrukh Dustov | 3-6,6-3,3-6 |