Stadium: Center Court Round: 25 Ground: Clay
| ITF Belgium F14 | 2016/09/10 12:00 | Leon Hoeveler v Valentin Guenther | 6-7,3-6 |
| ITF Turkey F7 | 2018/02/18 09:00 | Bogdan Bobrov v Valentin Guenther | 6-7,6-3,6-4 |
| ITF Turkey F7 | 2018/02/17 06:30 | Valentin Guenther v Luca George Tatomir | 6-3,6-1 |
| ITF Switzerland F1 | 2018/02/08 18:40 | Alejandro Davidovich Fokina v Valentin Guenther | 5-7,5-7 |
| ITF Switzerland F1 | 2018/02/06 12:00 | Valentin Guenther v Juan Pablo Ficovich | 7-6,6-2 |
| ITF Switzerland F1 Qual | 2018/02/05 09:00 | Michael Vrbensky v Valentin Guenther | 4-6,5-7 |
| ITF Switzerland F1 Qual | 2018/02/04 09:00 | Alexander Wolfschmidt v Valentin Guenther | 2-6,3-6 |
| ITF Germany F3 | 2018/02/01 17:00 | Robin Kern v Valentin Guenther | 3-6,6-3,6-4 |
| ITF Germany F3 | 2018/01/30 12:30 | Valentin Guenther v Karlo Cubelic | 6-7,6-4,6-4 |
| ITF France F6 Qual | 2018/03/18 10:00 | Alexis Boureau v Leon Hoeveler | 6-1,6-0 |
| ITF France F6 Qual | 2018/03/17 11:40 | Yanis Muesser v Leon Hoeveler | 2-6,1-6 |
| ITF Greece F3 | 2018/03/10 10:00 | Cristopher Kohl v Leon Hoeveler | 6-2,6-3 |
| ITF Greece F2 | 2018/03/03 07:30 | Luca Giacomini v Leon Hoeveler | 6-1,6-1 |
| ITF Italy F1 Qual | 2018/02/24 08:30 | Raul Brancaccio v Leon Hoeveler | 6-2,6-3 |
| ITF Switzerland F2 Qual | 2018/02/10 08:00 | Bastien Kolly v Leon Hoeveler | 6-4,6-1 |
| ITF Switzerland F1 Qual | 2018/02/04 09:00 | Giordan Kunz v Leon Hoeveler | 6-3,7-6 |
| ITF Germany F3 Qual | 2018/01/29 16:40 | Christoph Negritu v Leon Hoeveler | 6-3,6-0 |