Stadium: Court 5 Round: 54 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2019/05/09 07:00 | Glasspool, Lloyd v Guenther, Valentin | 7-6,6-4 |
| ITF - M15 Héraklion | 2019/05/07 10:00 | Guenther, Valentin v Addison, Aaron | 6-3,7-6 |
| Bolton, Qualifications Simples M-ITF-GBR-03A | 2019/04/01 08:00 | Farmer, Elliott v Guenther, Valentin | 6-3,7-5 |
| ITF - M15 Poitiers | 2019/03/11 16:35 | Faivre, Pierre v Guenther, Valentin | 6-1,6-2 |
| ITF - M15 Poitiers | 2019/03/11 13:05 | Emilien Voisin v Guenther, Valentin | 1-6,6-7 |
| Oslo, Singles M-ITF-NOR-01A | 2019/03/05 09:00 | Guenther, Valentin v Mayer, Patrick | 1-6,6-3,9-11 |
| ITF - M15 Monastir | 2019/02/07 08:00 | Jacopo Berrettini v Guenther, Valentin | 5-7,7-5,7-5 |
| ITF - M15 Monastir | 2019/02/06 13:40 | Guenther, Valentin v Mohanty, Arnav | 6-4,6-0 |
| ITF - M15 Héraklion | 2019/05/08 09:40 | Eminefendic, Ervin Haris v Boyer, Dusty H | 1-6,0-6 |
| ITF - M15 Héraklion | 2019/05/06 09:00 | Thursfield, Harry v Eminefendic, Ervin Haris | 5-7,4-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/04/15 08:00 | Eminefendic, Ervin Haris v Bossel, Adrien | 2-6,3-6 |
| ITF - M15 Opatija | 2019/03/27 09:40 | Eminefendic, Ervin Haris v Aichhorn, Jakob | 2-6,2-6 |
| ITF Tunisia F42 | 2018/11/27 08:00 | Eminefendic, Ervin Haris v Gerritsen, Stephan | 1-6,2-6 |
| ITF Tunisia F41 | 2018/11/17 10:00 | Musset, Simon v Eminefendic, Ervin Haris | 6-3,6-4 |
| Tunisia F40, Singles | 2018/11/10 13:30 | Hoeyeraal, Herman v Eminefendic, Ervin Haris | 6-2,7-5 |
| ITF Tunisia F38 | 2018/10/28 10:00 | Roglan, Albert v Eminefendic, Ervin Haris | 6-1,6-2 |