Stadium: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Doha | 2019/10/23 12:00 | Guenther, Valentin v Goldsteiner, Peter | 6-2,6-3 |
| 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 - M15 Doha | 2019/10/23 12:00 | Karl Friberg v Igoshin, Alexander | 6-4,6-4 |
| ITF M25 Falun | 2019/10/03 12:00 | Podzus, Martins v Karl Friberg | 6-3,6-4 |
| ITF M25 Falun | 2019/10/01 11:00 | Yitbarek, Simon v Karl Friberg | 3-6,2-6 |
| Stockholm, Singles M-ITF-SWE-05A | 2019/09/25 12:45 | Karl Friberg v Kaichi Uchida | 4-6,4-6 |
| Mulhouse, Singles M-ITF-FRA-16A | 2019/09/12 14:25 | Avidzba, Alen v Karl Friberg | 6-3,6-1 |
| Mulhouse, Singles M-ITF-FRA-16A | 2019/09/11 09:00 | Albano Olivetti v Karl Friberg | 2-6,4-6 |
| ITF M15 Helsinki | 2019/08/23 10:00 | Vidal Azorin, Jose Fco v Karl Friberg | 6-3,2-6,6-3 |
| ITF M15 Helsinki | 2019/08/22 08:00 | Smola, Maciej v Karl Friberg | 3-6,3-6 |