Chile have been knocked out by Brazil the last three times they have reached the knockout stages of the World Cup, in 1962, 1998 and 2010.
However, the duo have insisted that their 'changed' side are up for the challenge when they meet once again in the last 16.
"Brazil has been a nightmare for Chile, but things have changed, generations change," midfielder Vidal told reporters.
Meanwhile, defender Jara added: "We are going to attack from the start as we do in every game. You don't negotiate your style."
The two South American rivals face off in Belo Horizonte on Saturday.