| 2018 Challenger ATP Cachantún Cup | ||||
|---|---|---|---|---|
| Date | 5–10 March | |||
| Edition | 11th | |||
| Draw | 32S / 16D | |||
| Surface | Red clay | |||
| Location | Santiago,Chile | |||
| Champions | ||||
| Singles | ||||
 Marco Cecchinato | ||||
| Doubles | ||||
 Romain Arneodo / Jonathan Eysseric | ||||
| ||||
The2018Cachantún Open by KIA was a professionaltennis tournament played onred clay courts. It was the 11th edition of the tournament which was part of the2018 ATP Challenger Tour. It took place inSantiago,Chile between 5 and 10 March 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 POR | Gastão Elias | 102 | 1 |
| ITA | Marco Cecchinato | 103 | 2 |
 BRA | Rogério Dutra Silva | 106 | 3 |
| POR | Pedro Sousa | 121 | 4 |
 SVK | Andrej Martin | 124 | 5 |
| BRA | Thiago Monteiro | 125 | 6 |
 ARG | |||
| BRA | Thomaz Bellucci | 132 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
The following players received entry as lucky losers:
Marco Cecchinato def.
Carlos Gómez-Herrera 1–6, 6–1, 6–1.Romain Arneodo /Jonathan Eysseric def.Guido Andreozzi /Guillermo Durán 7–6(7–4), 1–6, [12–10].
