The South Americans opened their tournament with a 3-1 win against Australia last week.
They now face holders Spain on Wednesday, who will be under pressure following their shock 5-1 defeat to the Netherlands.
"Spain are the world champions, they have quality," he told FIFA's official website. "They have great players who will go out onto the pitch very angry. We hope to play well and take the three points.
"Eliminating Spain would be great, but we haven't come here for that. We've come here to win the World Cup."
Vidal has scored eight goals in his 45 appearances for Chile.