| Champ: |  Hugo Dellien |
| Runner: | Wu Tung-lin |
| Score: | 5–7, 7–6(7–1), 6–1 |
| Type: | singles doubles |
| After Name: | Challenger de Santiago – Singles |
| After Year: | 2021 |
See main article: article and 2019 Challenger ATP Cachantún Cup.
Marco Cecchinato was the defending champion but chose not to defend his title.[1]
Hugo Dellien won the title after defeating Wu Tung-lin 5–7, 7–6(7–1), 6–1 in the final.
All seeds receive a bye into the second round.