Stadium: Court 6 Round: 25 Ground: Hardcourt outdoor
| Challenger Fairfield | 2018/10/08 18:45 | Mitchell Krueger v Sebastian Fanselow | 0-6,2-6 |
| Challenger Fairfield | 2018/10/07 19:50 | Sebastian Fanselow v Pablo Vivero Gonzalez | 6-4,2-6,7-5 |
| Challenger Fairfield | 2018/10/06 17:00 | Sebastian Fanselow v Andrew Harris | 3-6,6-1,6-1 |
| 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 |
| Challenger Stockton | 2018/10/01 21:30 | Christopher Eubanks v Cem Ilkel | 6-4,7-6 |
| Challenger Tiburon | 2018/09/26 18:00 | Marcel Granollers v Cem Ilkel | 6-2,7-5 |
| Challenger Tiburon | 2018/09/25 18:50 | Cem Ilkel v Lucas Miedler | 4-6,6-4,6-3 |
| Challenger Tiburon | 2018/09/24 17:00 | Cem Ilkel v Luke Saville | 6-3,6-7,6-3 |
| Challenger Tiburon | 2018/09/23 20:55 | Cem Ilkel v Jenson Brooksby | 6-4,4-6,6-4 |
| Challenger Tiburon | 2018/09/22 23:00 | Cem Ilkel v Sebastian Korda | 7-6,6-2 |
| Challenger Istanbul | 2018/09/14 11:10 | Cem Ilkel v Corentin Moutet | 6-7,3-6 |
| Challenger Istanbul | 2018/09/12 10:05 | Oscar Otte v Cem Ilkel | 3-6,4-6 |