Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF Kuwait F2 | 2018/11/08 07:15 | Antonio Cayetano March v Kai Wehnelt | 6-4,1-6,6-3 |
| ITF Kuwait F2 | 2018/11/06 07:30 | Yuichiro Inui v Kai Wehnelt | 6-4,5-7,4-6 |
| ITF Kuwait F1 | 2018/11/02 07:00 | Peter Heller v Kai Wehnelt | 4-6,6-2,7-5 |
| ITF Kuwait F1 | 2018/11/01 07:00 | Preston Brown v Kai Wehnelt | 2-6,6-3,4-6 |
| ITF Kuwait F1 | 2018/10/30 08:35 | Hasan Abdulnabi v Kai Wehnelt | 2-6,3-6 |
| ITF Egypt F23 | 2018/10/18 09:25 | Kai Wehnelt v Neil Pauffley | 2-6,2-6 |
| ITF Egypt F23 | 2018/10/17 09:30 | Kai Wehnelt v Mattia Rossi | 7-6,6-4 |
| ITF Egypt F22 | 2018/10/12 08:00 | Giorgio Ricca v Kai Wehnelt | 7-6,6-3 |
| Challenger Eckental | 2018/10/31 17:00 | Evgeny Donskoy v Igor Sijsling | 6-1,6-1 |
| Challenger Eckental | 2018/10/29 10:00 | Alexander Bublik v Igor Sijsling | 3-6,0-6 |
| Challenger Eckental | 2018/10/28 10:00 | Igor Sijsling v Tobias Simon | 3-6,7-6,6-2 |
| Challenger Eckental | 2018/10/27 07:30 | Igor Sijsling v Lukas Klein | 7-6,6-3 |
| Challenger Como | 2018/08/25 12:10 | Igor Sijsling v Facundo Arguello | 5-7,1-6 |
| Challenger Lexington | 2018/07/31 17:55 | Ronnie Schneider v Igor Sijsling | 6-2,6-4 |
| ITF Germany F5 | 2018/06/27 15:25 | Filip Bergevi v Igor Sijsling | 6-1,6-2 |
| ITF Germany F5 | 2018/06/25 09:00 | Igor Sijsling v Jannik Rother | 6-1,6-3 |