2018 Challenger ATP Cachantún Cup
| 2018 Challenger ATP Cachantún Cup | |
|---|---|
| Date | 5 – 10 March |
| Edition | 11th |
| Draw | 32S / 16D |
| Surface | Clay (red) |
| Location | Santiago, Chile |
| 2017 Champions | |
| Singles | |
 Rogério Dutra Silva | |
| Doubles | |
 Marcelo Tomás Barrios Vera / Nicolás Jarry | |
The 2018 Challenger ATP Cachantún Cup was a professional tennis tournament played on red clay courts. It was the 11th edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Santiago, Chile between 5 and 10 March 2018.
Singles main draw entrants
Seeds
| 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
|
Carlos Berlocq | 131 | 7 |
| BRA
|
Thomaz Bellucci | 132 | 8 |
- 1 Rankings are as of 26 February 2018.
Other entrants
The following players received wildcards into the singles main draw:
- Marcelo Tomás Barrios Vera
- Christian Garín
- Gonzalo Lama
- Alejandro Tabilo
The following player received entry into the singles main draw as an alternate:
The following players received entry from the qualifying draw:
Champions
Singles
vs.
Doubles
- / vs. /