Stadium: C Round: 45 Ground: Hardcourt outdoor
| 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 |
| Challenger Columbus | 2018/09/17 16:35 | Alexei Popyrin v Roberto Ortega-Olmedo | 4-6,7-6,7-5 |
| Challenger Cary | 2018/09/11 21:10 | Roberto Ortega-Olmedo v Dominik Koepfer | 6-3,5-7,1-6 |
| Challenger Seville | 2018/09/03 08:30 | Alex Molcan v Roberto Ortega-Olmedo | 7-5,6-3 |
| Challenger Seville | 2018/09/01 18:30 | Thomas Statzberger v Roberto Ortega-Olmedo | 4-6,6-2,4-6 |
| Challenger Mallorca | 2018/08/29 12:25 | Roberto Ortega-Olmedo v Kenny de Schepper | 6-7,4-6 |
| Challenger Segovia | 2018/08/01 12:00 | Roberto Ortega-Olmedo v Ugo Humbert | 6-4,3-6,2-6 |
| Challenger Tampere | 2018/07/24 15:30 | Juan Ignacio Londero v Roberto Ortega-Olmedo | 6-1,7-5 |
| Challenger Astana | 2018/07/17 08:55 | Roberto Ortega-Olmedo v Pavel Kotov | 6-7,6-4,5-7 |