Estádio: Cancha Raul Viver Round: 25 Ground: Clay
| 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 |