Stadium: Court 2 Round: 25 Ground: Hardcourt outdoor
| ITF USA F9 | 2018/04/08 17:10 | Scott Griekspoor v Sebastian Fanselow | 6-7,6-4,7-5 |
| US Open | 2018/08/21 16:45 | Norbert Gombos v Scott Griekspoor | 6-4,4-6,6-3 |
| Challenger Segovia | 2018/07/31 09:50 | Scott Griekspoor v Andres Artunedo Martinavarr | 6-3,1-6,6-7 |
| Challenger Prague | 2018/07/25 09:00 | Scott Griekspoor v Pedro Martinez | 6-4,4-6,5-7 |
| Challenger Prague | 2018/07/23 15:30 | Marek Podlesak v Scott Griekspoor | 1-6,4-6 |
| Challenger Scheveningen | 2018/07/17 16:45 | Scott Griekspoor v Kimmer Coppejans | 6-2,4-6,3-6 |
| Challenger Milan | 2018/06/26 11:55 | Andrea Arnaboldi v Scott Griekspoor | 7-6,6-4 |
| Challenger Blois | 2018/06/24 13:00 | Felix Auger Aliassime v Scott Griekspoor | 4-6,4-6 |
| Challenger Blois | 2018/06/23 15:10 | Scott Griekspoor v Stephane Robert | 6-1,2-6,6-2 |
| Challenger Meerbusch Qual | 2018/08/12 08:00 | Yshai Oliel v Sebastian Fanselow | 6-4,6-2 |
| Challenger Meerbusch Qual | 2018/08/11 08:00 | Javier Barranco Cosano v Sebastian Fanselow | 7-5,4-6,4-6 |
| Challenger Pullach Qual | 2018/08/04 13:45 | Andreas Haider-Maurer v Sebastian Fanselow | 6-3,7-5 |
| ITF Italy F18 | 2018/07/13 17:20 | Jelle Sels v Sebastian Fanselow | 6-4,6-2 |
| ITF Italy F18 | 2018/07/12 11:50 | Sebastian Fanselow v Matias Zukas | 6-1,3-6,6-3 |
| ITF Italy F18 | 2018/07/11 09:30 | Sebastian Fanselow v Lorenzo Frigerio | 6-1,6-2 |
| ITF Italy F18 | 2018/07/10 13:05 | Sebastian Fanselow v Filippo Leonardi | 6-3,6-3 |
| Challenger Milan Qual | 2018/06/24 14:30 | Sebastian Fanselow v Alexei Popyrin | 5-7,5-7 |