Round: 26 Ground: Clay
| ITF Italy F29 | 2017/09/12 13:00 | Basso, Andrea v Guenther, Valentin | 5-7,0-6 |
| ITF Belgium F11 | 2017/09/01 13:30 | Guenther, Valentin v Dubail, Julien | 4-6,6-2,4-6 |
| ITF Belgium F11 | 2017/08/31 13:50 | Guenther, Valentin v Matteo Martineau | 6-4,3-6,7-6 |
| ITF Belgium F11 | 2017/08/29 16:00 | Geens, Clement v Guenther, Valentin | 5-7,6-7 |
| ITF Belgium F11 | 2017/08/27 10:00 | Guenther, Valentin v Duquesne, Goran | 6-1,6-0 |
| ITF Belgium F11 | 2017/08/26 10:30 | Guenther, Valentin v Sudzum, Marcel Marlon | 6-2,6-2 |
| ITF Germany F6 | 2017/07/03 12:00 | Tom Schonenberg v Guenther, Valentin | 6-4,7-6 |
| ITF Germany F6 | 2017/07/02 13:00 | Tholl, Robi v Guenther, Valentin | 0-6,1-6 |
| ITF Italy F29 | 2017/09/11 13:00 | Spinnato, Daniele v Benjamin Pietri | 2-6,0-6 |
| ITF Switzerland F5 | 2017/08/29 15:40 | Antoine Bellier v Benjamin Pietri | 6-2,7-6 |
| ITF Switzerland F5 | 2017/08/27 12:25 | Benjamin Pietri v Nicolas Parizzia | 7-5,7-6 |
| ITF Switzerland F4 Qual | 2017/08/20 07:00 | Benjamin Pietri v Batta, Amit | 1-6,6-1,3-6 |
| ITF Switzerland F4 Qual | 2017/08/19 09:00 | Benjamin Pietri v Zocastello, Marco | 6-3,6-4 |
| ITF Belgium F8 Qual | 2017/08/07 13:50 | Saez, Juan Carlos v Benjamin Pietri | 6-3,6-2 |
| ITF Belgium F8 Qual | 2017/08/06 08:00 | van Der Horst, Tim v Benjamin Pietri | 6-4,3-6,6-7 |
| ITF Belgium F8 Qual | 2017/08/05 09:30 | Lautaro Agustin Falabella v Benjamin Pietri | 3-6,1-6 |