Stadium: M Round: 27 Ground: Carpet indoor
| ITF Germany F3 | 2018/02/01 11:00 | Westerhof, Boy v Boutillier, Remi | 6-3,7-5 |
| ITF Germany F3 | 2018/01/30 10:00 | Westerhof, Boy v Veldheer, Mick | 6-3,6-4 |
| ITF Germany F2 | 2018/01/25 12:45 | Westerhof, Boy v Jan Choinski | 4-6,1-6 |
| ITF Germany F2 | 2018/01/23 13:15 | Westerhof, Boy v Juan Pablo Paz | 7-6,7-6 |
| ITF France F1 | 2018/01/14 14:00 | Gregoire Barrere v Westerhof, Boy | 6-4,7-5 |
| ITF France F1 | 2018/01/13 15:25 | Jacq, Gregoire v Westerhof, Boy | 6-2,1-6,6-7 |
| ITF France F1 | 2018/01/12 10:00 | Avidzba, Alen v Westerhof, Boy | 6-7,2-6 |
| ITF France F1 | 2018/01/10 10:00 | Louis Dussin v Westerhof, Boy | 6-3,0-6,4-6 |
| ITF Germany F3 | 2018/02/01 13:50 | Voljacques, Hugo v Igor Sijsling | 5-7,0-6 |
| ITF Germany F3 | 2018/01/31 17:50 | Igor Sijsling v Reboul, Fabien | 6-4,6-4 |
| ITF France F3 | 2018/01/25 12:55 | Igor Sijsling v Albano Olivetti | 3-6,6-4,3-6 |
| ITF France F3 | 2018/01/23 13:55 | Igor Sijsling v Yann Marti | 6-3,6-0 |
| 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 Desein, Niels | 4-6,2-6 |
| Challenger Eckental | 2017/11/02 12:30 | Igor Sijsling v Janowicz, Jerzy | 6-7,3-6 |