Stadium: C Round: 45 Ground: Hardcourt outdoor
| Challenger Stockton | 2018/09/29 18:50 | Sebastian Fanselow v Sarkissian, Alexander | 6-7,3-6 |
| Challenger Tiburon | 2018/09/22 17:00 | Sebastian Fanselow v Ortega-Olmedo, Roberto | 1-6,2-6 |
| Meerbusch, Allemagne, Qualifications | 2018/08/12 08:00 | Yshai Oliel v Sebastian Fanselow | 6-4,6-2 |
| Meerbusch, Allemagne, Qualifications | 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 | Haider-Maurer, Andreas 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 Zukas, Matias | 6-1,3-6,6-3 |
| ITF Italy F18 | 2018/07/11 09:30 | Sebastian Fanselow v Frigerio, Lorenzo | 6-1,6-2 |
| Challenger Stockton | 2018/09/30 23:45 | Kelly, Dayne v Harris, Andrew | 7-5,6-7,7-6 |
| Challenger Stockton | 2018/09/29 22:00 | Nguyen, Daniel v Harris, Andrew | 0-6,4-6 |
| Challenger Columbus | 2018/09/18 18:10 | Hernandez-Fernandez, Jose v Harris, Andrew | 6-4,6-1 |
| Challenger Chicago | 2018/09/02 21:50 | Harris, Andrew v Hugo Nys | 4-6,3-6 |
| ITF USA F23 | 2018/08/18 16:05 | Bangoura, Sekou v Harris, Andrew | 2-6,6-4,6-4 |
| ITF USA F23 | 2018/08/17 16:20 | Kirkov, Vasil v Harris, Andrew | 3-6,6-1,4-6 |
| ITF USA F23 | 2018/08/16 18:10 | Geller, Axel v Harris, Andrew | 4-6,4-6 |
| ITF USA F23 | 2018/08/15 14:00 | Bryde, Trent v Harris, Andrew | 4-6,7-6,4-6 |