Round: 25 Ground: Carpet indoor
| Challenger Andria | 2017/11/22 15:10 | Zdenek Kolar v Igor Sijsling | 6-3,6-3 |
| Challenger Andria | 2017/11/21 12:40 | Constant Lestienne v Igor Sijsling | 4-6,6-2,4-6 |
| Challenger Bratislava | 2017/11/07 12:30 | Igor Sijsling v Niels Desein | 4-6,2-6 |
| Challenger Eckental | 2017/11/02 12:30 | Igor Sijsling v Jerzy Janowicz | 6-7,3-6 |
| Challenger Eckental | 2017/10/31 16:55 | Evan Furness v Igor Sijsling | 3-6,2-6 |
| Challenger Ismaning | 2017/10/18 13:20 | Igor Sijsling v Tristan Lamasine | 6-4,1-6,6-7 |
| Challenger Ismaning | 2017/10/16 15:00 | Alex De Minaur v Igor Sijsling | 4-6,1-6 |
| Challenger Ortisei | 2017/10/10 10:30 | Igor Sijsling v Marc Sieber | 1-6,4-6 |
| ITF Francia F3 - Qual. | 2018/01/21 12:10 | Yann Marti v Joffrey De Schepper | 7-6,6-2 |
| ITF Francia F3 - Qual. | 2018/01/20 12:35 | Yann Marti v Louroi Martinez | 6-0,6-3 |
| ITF USA F2 | 2018/01/10 21:35 | Yann Marti v Karue Sell | 6-2,4-6,2-6 |
| Challenger Brescia - Qual. | 2017/11/11 15:40 | Yann Marti v Aliaksandr Bury | 6-7,6-1,5-7 |
| Challenger Eckental | 2017/10/31 12:20 | Konstantin Kravchuk v Yann Marti | 4-6,3-6 |
| Challenger Eckental - Qual. | 2017/10/30 10:00 | Mathias Bourgue v Yann Marti | 6-2,6-4 |
| Challenger Eckental - Qual. | 2017/10/29 10:20 | Yann Marti v Kevin Krawietz | 6-3,6-7,6-3 |
| Challenger Eckental - Qual. | 2017/10/28 10:25 | Marcus Mansson v Yann Marti | 6-7,4-6 |