Stadium: C Round: 62 Ground: Clay
| 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 |
| ITF Austria F3 | 2017/07/15 13:30 | Neil Oberleitner v Kai Lemstra | 1-6,0-6 |
| ITF Germany F15 | 2016/10/19 12:30 | Kai Lemstra v Alexandar Lazarov | 3-6,4-6 |
| ITF Germany F14 | 2016/10/10 10:00 | Lukas Ollert v Kai Lemstra | 7-5,6-2 |
| ITF Austria F6 | 2017/08/05 07:00 | Julian Schubert v Paolo Dagnino | 3-6,2-6 |
| ITF Austria F4 Qual | 2017/07/23 09:45 | Charles Broom v Paolo Dagnino | 2-6,6-4,6-4 |
| ITF Austria F4 Qual | 2017/07/22 10:00 | Pietro Pirolt v Paolo Dagnino | 2-6,2-6 |
| ITF Austria F3 | 2017/07/15 12:30 | Besir Durguti v Paolo Dagnino | 7-6,7-6 |
| Challenger Milan Qual | 2017/06/24 08:30 | Paolo Dagnino v Viktor Galovic | 3-6,4-6 |
| ITF Italy F18 Qual | 2017/06/19 09:35 | Facundo Jofre v Paolo Dagnino | 6-4,6-3 |
| ITF Italy F18 Qual | 2017/06/18 16:10 | Augusto Virgili v Paolo Dagnino | 4-6,1-6 |
| ITF Italy F17 | 2017/06/10 10:05 | Paolo Dagnino v Federico Maccari | 2-6,6-3,3-6 |