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 F21 | 2018/05/29 09:10 | Mats Rosenkranz v Valentin Guenther | 6-0,3-6,6-4 |
| ITF Turkey F20 | 2018/05/24 07:30 | Paul Woerner v Valentin Guenther | 6-2,6-3 |
| ITF Turkey F20 | 2018/05/23 07:30 | Louroi Martinez v Valentin Guenther | 2-6,0-6 |
| ITF Turkey F19 | 2018/05/15 08:25 | Koray Kirci v Valentin Guenther | 7-5,6-3 |
| ITF Egypt F14 | 2018/04/19 08:00 | Valentin Guenther v Pablo Vivero Gonzalez | 2-6,6-7 |
| ITF Egypt F14 | 2018/04/18 08:00 | Joy Vigani v Valentin Guenther | 3-6,4-6 |
| ITF Egypt F13 | 2018/04/09 08:30 | Oleg Khotkov v Valentin Guenther | 2-6,6-3,7-6 |
| ITF Egypt F13 | 2018/04/08 08:00 | Cristopher Kohl v Valentin Guenther | 4-6,4-6 |
| ITF Germany F4 | 2018/06/18 11:00 | Leon Hoeveler v Robert Strombachs | 1-6,2-6 |
| ITF Czech Republic F2 Qual | 2018/05/21 08:00 | Leon Hoeveler v Kody Pearson | 6-3,6-7,3-6 |
| ITF Czech Republic F2 Qual | 2018/05/20 09:00 | Leon Hoeveler v Marek Podlesak | 6-1,6-1 |
| ITF Italy F8 Qual | 2018/04/15 12:00 | Wilson Leite v Leon Hoeveler | 6-3,7-6 |
| ITF Italy F7 Qual | 2018/04/08 12:00 | Franco Capalbo v Leon Hoeveler | 6-0,6-2 |
| 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 |