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