Stadium: Court Jean Gachassin Round: 26 Ground: Hardcourt 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 |
| Challenger Shenzhen 2 | 2017/10/31 03:15 | Sadio Doumbia v Akira Santillan | 6-7,2-6 |
| Challenger Suzhou | 2017/10/26 02:30 | Hubert Hurkacz v Sadio Doumbia | 7-6,6-1 |
| Challenger Suzhou | 2017/10/24 02:30 | Sadio Doumbia v Yaraslav Shyla | 6-2,4-6,6-2 |
| Challenger Ningbo | 2017/10/17 08:20 | Adrian Menendez-Maceiras v Sadio Doumbia | 3-6,6-2,6-1 |
| ITF Portugal F20 | 2017/09/29 15:25 | Pedja Krstin v Sadio Doumbia | 6-1,6-1 |
| ITF Portugal F20 | 2017/09/28 09:30 | Sadio Doumbia v Roberto Ortega-Olmedo | 6-1,1-6,6-3 |
| ITF Portugal F20 | 2017/09/27 09:30 | Sadio Doumbia v Nuno Deus | 6-2,6-3 |
| ITF Portugal F20 | 2017/09/26 09:00 | Sadio Doumbia v Jaime Pulgar-Garcia | 4-6,6-3,6-3 |