2005 Movistar Open
| 2005 Movistar Open | |
|---|---|
| Date | 31 January – 6 February |
| Edition | 12th |
| Draw | 32S / 16D |
| Prize money | $355,000 |
| Surface | Clay / outdoor |
| Location | Viña del Mar, Chile |
| Champions | |
| Singles | |
 Gastón Gaudio | |
| Doubles | |
 David Ferrer / Santiago Ventura | |
The 2005 Movistar Open was an ATP men's tennis tournament held on outdoor clay courts in Viña del Mar, Chile. It was the 12th edition of the tournament and was held from 31 January to 6 February 2005. Gastón Gaudio won the singles title.
Finals
Singles
Gastón Gaudio defeated 
Fernando González 6–3, 6–4
- It was Gaudio's 1st title of the year and the 6th of his career.
Doubles
David Ferrer / Santiago Ventura defeated Gastón Etlis / Martín Rodríguez 6–3, 6–4
- It was Ferrer's 1st title of the year and the 2nd of his career. It was Ventura's 1st title of the year and the 2nd of his career.