Stadium: Court 2 Round: 54 Ground: Clay
| ITF Germany F11 | 2017/08/17 13:45 | Kai Lemstra v Daniel Kopeinigg | 6-7,2-6 |
| ITF Germany F11 | 2017/08/15 10:30 | Corrado Summaria v Kai Lemstra | 4-6,5-7 |
| ITF Austria F6 | 2017/08/05 10:00 | Kai Lemstra v Paolo Dagnino | 4-6,2-6 |
| ITF Austria F5 | 2017/07/31 08:00 | Alen Rogic-Hadzalic v Kai Lemstra | 1-6,6-0,6-4 |
| ITF Austria F5 | 2017/07/30 08:00 | Bernie Schranz v Kai Lemstra | 0-6,5-7 |
| ITF Austria F5 | 2017/07/29 08:00 | Philip Aplienz v Kai Lemstra | 2-6,1-6 |
| ITF Austria F3 | 2017/07/18 10:20 | Peter Heller v Kai Lemstra | 4-6,6-3,6-3 |
| ITF Austria F3 | 2017/07/16 11:25 | Edward Hubner v Kai Lemstra | 1-6,3-6 |
| Challenger Meerbusch Qual | 2017/08/12 15:40 | Anton Chekhov v Kai Breitbach | 6-3,2-6,6-7 |
| Challenger Portoroz Qual | 2017/08/06 14:35 | Albano Olivetti v Anton Chekhov | 6-3,6-0 |
| Challenger Biella Qual | 2017/07/29 11:50 | Gianluca Mager v Anton Chekhov | 6-1,6-2 |
| ITF France F17 | 2017/07/24 16:15 | Anton Chekhov v Nathan Seateun | 1-6,0-6 |
| ITF France F17 Qual | 2017/07/23 11:35 | Felipe D'Annunzio v Anton Chekhov | 4-6,3-6 |
| ITF France F17 Qual | 2017/07/22 13:35 | Anton Chekhov v Tomas Coronel | 6-4,7-5 |
| Challenger Scheveningen Qual | 2017/07/15 08:00 | Anton Chekhov v Lucas Gomez | 2-6,1-6 |
| Challenger Braunschweig Qual | 2017/07/08 10:10 | Dino Marcan v Anton Chekhov | 6-3,6-1 |