| Doubles | |
|---|---|
| 2019 Challenger ATP Cachantún Cup | |
| Champions |  Franco Agamenone  Fernando Romboli |
| Runners-up | Facundo Argüello  Martín Cuevas |
| Final score | 7–6(7–5), 1–6, [10–6] |
Romain Arneodo and Jonathan Eysseric were the defending champions but chose not to defend their title.
Franco Agamenone and Fernando Romboli won the title after defeating Facundo Argüello and Martín Cuevas 7–6(7–5), 1–6, [10–6] in the final.
Gonzalo Escobar / Fabrício Neis (first round)
Hugo Dellien / Guillermo Durán (semifinals) Franco Agamenone / Fernando Romboli (champions) Facundo Argüello / Martín Cuevas (final)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | G Escobar F Neis | 3 | 5 | ||||||||||||||||||||||||
| WC |  MT Barrios Vera G Lama | 6 | 7 | WC | MT Barrios Vera G Lama | 7 | 6 | ||||||||||||||||||||
| ITF | MF Descotte C Ugo Carabelli | 1 | 2 |  S Galdós T Monteiro | 5 | 4 | |||||||||||||||||||||
| S Galdós T Monteiro | 6 | 6 | WC | MT Barrios Vera G Lama | 63 | 3 | |||||||||||||||||||||
| 3 | F Agamenone F Romboli | 6 | 77 | 3 | F Agamenone F Romboli | 77 | 6 | ||||||||||||||||||||
 K Coppejans  A Martin | 4 | 63 | 3 | F Agamenone F Romboli | 5 | 6 | [10] | ||||||||||||||||||||
 GM Moroni  C Taberner | 77 | 5 | [10] | GM Moroni C Taberner | 7 | 2 | [8] | ||||||||||||||||||||
G Granollers  S Nagal | 64 | 7 | [5] | 3 | F Agamenone F Romboli | 77 | 1 | [10] | |||||||||||||||||||
| WC | Bastián Malla Víctor Núñez | w/o | 4 | F Argüello M Cuevas | 65 | 6 | [6] | ||||||||||||||||||||
| ITF | J Menezes J Souza | WC | B Malla V Núñez | 2 | 1 | ||||||||||||||||||||||
| WC | D Hidalgo A Tabilo | 7 | 63 | [2] | 4 | F Argüello M Cuevas | 6 | 6 | |||||||||||||||||||
| 4 | F Argüello M Cuevas | 5 | 77 | [10] | 4 | F Argüello M Cuevas | 6 | 3 | [10] | ||||||||||||||||||
| A Collarini F Coria | 6 | 5 | [9] | 2 | H Dellien G Durán | 1 | 6 | [7] | |||||||||||||||||||
| PR | F Mena R Olivo | 1 | 7 | [11] | PR | F Mena R Olivo | 1 | 6 | [6] | ||||||||||||||||||
| D Gimeno Traver P Martínez | 7 | 3 | [7] | 2 | H Dellien G Durán | 6 | 4 | [10] | |||||||||||||||||||
| 2 | H Dellien G Durán | 5 | 6 | [10] | |||||||||||||||||||||||
Go Soeda was the defending champion, but decided not to participate.
Martín Alund and Juan-Martín Aranguren were the champions in 2009 but decided not to participate.
Facundo Argüello and Agustín Velotti won the final against Claudio Grassi and Luca Vanni 7–6(7–4), 7–6(7–5).
Facundo Argüello and Agustín Velotti were the defending champions but decided not to participate.
Andrés Molteni and Fernando Romboli defeated Marcelo Demoliner and Sergio Galdós 6–4, 6–4 in the final.
Martín Cuevas and Pablo Cuevas were the defending champions and successfully defended their title, defeating Nicolás Jarry and Gonzalo Lama in the final, 6–2, 6–4.
Rafael Nadal was the defending champion, but lost in the semifinals to Fabio Fognini.
Rafael Nadal was the defending champion, but lost to Dominic Thiem in the semifinals.
Pablo Cuevas was the defending champion and successfully defended his title, defeating Pablo Carreño Busta in the final, 7–6(7–4), 6–3.
Marcelo Arévalo and Sergio Galdós were the defending champions, but only Arévalo decided to defend his title, partnering Darian King. Arévalo lost in the quarterfinals to Alejandro Falla and Eduardo Struvay.
Julio Peralta and Horacio Zeballos were the defending champions but chose not to defend their title.
Austin Krajicek and Jackson Withrow were the defending champions but only Krajicek chose to defend his title, partnering Matt Reid. Krajicek withdrew before the tournament began due to injury.
This was the first edition of the tournament.
Máximo González and Fabrício Neis were the defending champions but only Neis chose to defend his title, partnering Rafael Matos. Neis lost in the quarterfinals to Thiago Monteiro and Pedro Sakamoto.
Miguel Ángel Reyes-Varela and Blaž Rola were the defending champions but chose not to defend their title.
Romain Arneodo and Fernando Romboli were the defending champions but only Romboli chose to defend his title, partnering Fabrício Neis. Romboli lost in the first round to Sergio Galdós and Federico Zeballos.
Guido Andreozzi was the defending champion but lost in the second round to Emilio Gómez.
Facundo Bagnis and Ariel Behar were the defending champions but only Bagnis chose to defend his title, partnering Franco Agamenone. Bagnis lost in the first round to Sander Gillé and Joran Vliegen.
The 2019 Challenger ATP Cachantún Cup was a professional tennis tournament played on red clay courts. It was the 12th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Santiago, Chile between 4 and 10 March 2019.
Fabio Fognini was the defending champion, but he chose to compete in Umag instead.
Guido Andreozzi and Guillermo Durán were the defending champions but only Durán chose to defend his title, partnering Mariano Kestelboim. Durán lost in the first round to Facundo Mena and Camilo Ugo Carabelli.
Franco Agamenone and Fernando Romboli were the defending champions but chose not to defend their title.