The 2017 Challenger ATP Cachantún Cup was a professional tennis tournament played on red clay courts. It was the 10th edition of the tournament which will be part of the 2017 ATP Challenger Tour. It took place in Santiago, Chile between 6 and 11 March 2017.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Brazil | Rogério Dutra Silva | 84 | 1 | |
 Argentina | Nicolás Kicker | 100 | 2 | |
 Austria | Gerald Melzer | 107 | 3 | |
 Japan | Taro Daniel | 117 | 4 | |
 Belgium | Arthur De Greef | 120 | 5 | |
 Spain | Íñigo Cervantes | 125 | 6 | |
 Italy | Alessandro Giannessi | 127 | 7 | |
| Brazil | João Souza | 131 | 8 |
The following players received wildcards into the singles main draw:
The following player received entry using a protected ranking:
The following players received entry from the qualifying draw:
See main article: 2017 Challenger ATP Cachantún Cup – Singles.
Rogério Dutra Silva def. Nicolás Jarry 7–5, 6–3.See main article: 2017 Challenger ATP Cachantún Cup – Doubles.
Máximo González / Andrés Molteni 6–4, 6–3.
