Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Manacor | 2020/01/12 10:00 | Guenther, Valentin v Patzanovsky, Christopher | 4-6,7-5,10-5 |
| ITF - M15 Manacor | 2020/01/09 09:00 | Jonas Forejtek v Guenther, Valentin | 6-2,1-6,6-4 |
| ITF - M15 Manacor | 2020/01/07 10:30 | Valentin Royer v Guenther, Valentin | 3-6,1-6 |
| ITF - M15 Héraklion | 2019/12/03 09:30 | Jakub Paul v Guenther, Valentin | 6-3,6-4 |
| ITF - M15 Héraklion | 2019/11/27 09:30 | Guenther, Valentin v Park, Uisung | 3-6,2-6 |
| ITF - M15 Héraklion | 2019/11/26 08:00 | Guenther, Valentin v Khomich, Aleksei | 6-4,5-7,10-8 |
| ITF - M15 Héraklion | 2019/11/25 09:00 | Guenther, Valentin v Bernabe, Arthur | 7-6,6-0 |
| ITF M15 Villers Les Nancy | 2019/11/13 09:00 | Guenther, Valentin v Tchoutakian, Maxime | 4-6,3-6 |
| ITF - M15 Veigy-Foncenex | 2020/01/28 09:00 | Erler, Alexander v Mats Rosenkranz | 3-6,7-6,2-6 |
| ITF - M25 Nussloch | 2020/01/23 11:30 | Erler, Alexander v Seifert, Stefan | 4-6,3-6 |
| ITF - M15 Héraklion | 2019/11/17 08:30 | Erler, Alexander v Zielinski, Jan | 7-5,6-1 |
| ITF - M15 Héraklion | 2019/11/16 12:00 | Yshai Oliel v Erler, Alexander | 4-6,6-2,1-6 |
| ITF - M15 Héraklion | 2019/11/16 08:00 | Erler, Alexander v Nikita Mashtakov | 6-1,3-6,6-3 |
| ITF - M15 Héraklion | 2019/11/15 08:00 | Erler, Alexander v Billy Harris | 6-3,3-6,6-4 |
| ITF - M15 Héraklion | 2019/11/12 08:30 | Erler, Alexander v Toby Martin | 6-3,3-6,6-3 |
| ITF - M15 Héraklion | 2019/11/08 08:00 | Erler, Alexander v Yshai Oliel | 2-6,3-6 |