Stadium: Centre Court Round: 26 Ground: Clay
| Challenger Santo Domingo MD | 2018/10/12 02:00 | Melzer G / Melzer J v Paes L / Reyes-Varela M | 5-7,6-7 |
| Challenger Santo Domingo MD | 2018/10/08 22:40 | Melzer G / Melzer J v Begemann A / Polasek F | 6-3,6-3 |
| Challenger Monterrey MD | 2018/10/02 00:50 | Behar A / Quiroz R v Melzer G / Melzer J | 6-4,4-6,11-9 |