Stadium: Van Mossel Kia Court Round: 26 Ground: Clay
| Challenger Amersfoort | 2019/07/17 16:30 | Tallon Griekspoor v Sebastian Fanselow | 6-1,4-6,3-6 |
| Challenger Amersfoort | 2019/07/15 16:30 | Ryan Nijboer v Sebastian Fanselow | 4-6,2-6 |
| Ludwigshafen, Allemagne | 2019/07/03 16:00 | Brown, Dustin v Sebastian Fanselow | 6-3,6-2 |
| Ludwigshafen, Allemagne | 2019/07/01 11:50 | Alexey Vatutin v Sebastian Fanselow | 7-5,2-6,6-7 |
| Milan, Italy | 2019/06/27 14:00 | Aslan Karatsev v Sebastian Fanselow | 6-4,6-2 |
| Milan, Italy | 2019/06/26 13:30 | Sebastian Fanselow v Lorenzi, Paolo | 6-4,7-5 |
| Milan, Italy | 2019/06/24 15:30 | Sebastian Fanselow v Heyman, Christopher | 7-5,7-6 |
| Challenger Bratislava | 2019/06/19 08:00 | Sebastian Fanselow v Alexey Vatutin | 4-6,4-6 |
| Challenger Amersfoort | 2019/07/17 13:35 | Igor Sijsling v Tatlot, Johan Sebastien | 6-3,7-5 |
| Challenger Amersfoort | 2019/07/16 08:00 | Lenz, Julian v Igor Sijsling | 4-6,1-6 |
| Challenger Amersfoort | 2019/07/15 08:00 | Igor Sijsling v Martos Gornes, Sergio | 6-1,6-1 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/06 12:10 | Igor Sijsling v Zukas, Matias | 6-7,6-1,3-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/05 15:00 | Manuel Guinard v Igor Sijsling | 0-6,2-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/04 16:00 | van Den Berg, Bart v Igor Sijsling | 3-6,2-6 |
| Den Haag, Singles Qualifying M-ITF-NED-02A | 2019/07/03 13:35 | Hermans, Mats v Igor Sijsling | 2-6,1-6 |
| ITF M15 Alkmaar | 2019/06/28 14:35 | Jesper De Jong v Igor Sijsling | 7-6,3-6,6-4 |