Stadium: Court 5 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Doha | 2019/10/16 15:55 | Guenther, Valentin v Rodriguez-Pace, Ricardo | 3-6,6-7 |
| ITF M25 Nevers | 2019/10/03 09:00 | Guenther, Valentin v Dan Added | 3-6,2-6 |
| Horgen, Singles Qualifying M-ITF-SUI-03A | 2019/08/30 11:00 | Guenther, Valentin v Damien Wenger | 1-6,4-6 |
| Horgen, Singles Qualifying M-ITF-SUI-03A | 2019/08/28 11:25 | Antoine Bellier v Guenther, Valentin | 4-6,7-6,3-6 |
| ITF M15 Ueberlingen | 2019/08/22 08:00 | Peter Heller v Guenther, Valentin | 6-4,6-3 |
| ITF M15 Ueberlingen | 2019/08/21 09:35 | Guenther, Valentin v Fellin, Manfred | 3-6,6-2,6-1 |
| ITF M25 Kassel | 2019/07/19 12:00 | Doumbia, Sadio v Guenther, Valentin | 7-5,6-2 |
| ITF M25 Kassel | 2019/07/18 09:00 | Marek Gengel v Guenther, Valentin | 7-6,2-6,4-6 |
| ITF - M15 Doha | 2019/10/17 14:45 | Veldheer, Mick v Goldsteiner, Peter | 4-6,6-2,6-4 |
| ITF - M15 Doha | 2019/10/16 17:50 | Zayed, Mousa Shanan v Goldsteiner, Peter | 0-6,2-6 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/10/02 13:00 | Eysseric, Jonathan v Goldsteiner, Peter | 6-7,6-3,6-3 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/09/26 13:00 | Goldsteiner, Peter v Bega, Alessandro | 1-6,2-6 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/09/25 15:35 | Sergis Kyratzis v Goldsteiner, Peter | 1-6,7-6,1-6 |
| ITF M15 Sintra | 2019/08/22 10:30 | Kyrian Jacquet v Goldsteiner, Peter | 6-1,4-6,6-3 |
| ITF M15 Sintra | 2019/08/21 14:25 | Goldsteiner, Peter v Azevedo Pereira E Oliveira, Bernardo | 6-0,6-3 |
| ITF M15 Sintra | 2019/08/14 09:00 | Goncalo Falcao v Goldsteiner, Peter | 6-1,7-6 |