Stadium: Court 10 Round: 45 Ground: Hardcourt indoor
| ITF Germany F11 | 2016/08/14 12:00 | Valentin Guenther v Patrick Mayer | 6-3,4-6,6-4 |
| ITF - M15 Monastir | 2019/02/07 08:00 | Jacopo Berrettini v Valentin Guenther | 5-7,7-5,7-5 |
| ITF - M15 Monastir | 2019/02/06 13:40 | Valentin Guenther v Arnav Mohanty | 6-4,6-0 |
| ITF - M15 Monastir | 2019/01/31 11:40 | Corentin Denolly v Valentin Guenther | 6-3,6-4 |
| ITF - M15 Monastir | 2019/01/30 09:00 | Simon A Ivanov v Valentin Guenther | 5-7,6-1,2-6 |
| ITF - M15 Monastir | 2019/01/28 10:00 | Valentin Guenther v Domen Gostincar | 6-4,3-6,10-6 |
| ITF - M15 Monastir | 2019/01/21 08:30 | Valentin Guenther v Domen Gostincar | 6-2,1-6,7-10 |
| ITF Qatar F6 | 2018/12/18 07:00 | Alexander Zhurbin v Valentin Guenther | 3-6,6-3,6-2 |
| ITF Qatar F6 | 2018/12/17 14:35 | Mirko Cutuli v Valentin Guenther | 5-7,0-6 |
| ITF M15 Oslo | 2019/03/04 09:00 | Melker Isaksson v Patrick Mayer | 4-6,2-6 |
| ITF - M25 Trento | 2019/02/25 14:00 | Jakub Paul v Patrick Mayer | 6-1,6-1 |
| ITF - M25 Trento | 2019/02/25 09:00 | Leonardo Taddia v Patrick Mayer | 2-6,0-6 |
| ITF - M25 Nussloch | 2019/01/21 10:50 | Robin Lang v Patrick Mayer | 5-7,7-5,10-7 |
| ITF Qatar F5 | 2018/12/09 12:00 | Patrick Mayer v Florian Lakat | 2-6,2-6 |
| ITF Qatar F5 | 2018/12/08 08:00 | Jesper De Jong v Patrick Mayer | 3-6,1-6 |
| ITF Qatar F4 | 2018/12/03 12:00 | Mikalai Haliak v Patrick Mayer | 7-6,6-2 |
| ITF Qatar F4 | 2018/12/02 13:35 | Aliaksandr Prudnikau v Patrick Mayer | 2-6,1-6 |