Stadium: Court 8 Round: 25 Ground: Hardcourt outdoor
| Challenger Guayaquil | 2018/10/29 19:45 | Pedja Krstin v Roberto Cid Subervi | 6-3,7-6 |
| Challenger Santo Domingo | 2018/10/08 23:10 | Pedja Krstin v Roberto Cid Subervi | 6-0,6-1 |
| Challenger Almaty | 2018/06/14 07:45 | Roberto Cid Subervi v Pedja Krstin | 2-6,7-5,3-6 |
| Challenger Morelos | 2018/02/21 19:45 | Pedja Krstin v Roberto Cid Subervi | 6-7,6-3,6-0 |