The Chile coach labels the Selecao the best team in the world but insists that his side will not change their style when the two sides meet at Toronto's Rogers Centre on Tuesday
La Roja are well known for their aggressive pressing style and the boss says that, while they must be aware of the Selecao's talented forward line, there will be no departure from the attacking system that has seen them score 21 goals in their last seven games.
They arrive in Canada following a 2-0 victory over England at Wembley on Friday and Sampaoli believes that the game is crucial to his World Cup preparations, while labelling Brazil the best team in the world.
"We will not modify our game. We will press and try to recover the ball quickly," he told a press conference at Toronto's Four Seasons Hotel.
"We will try to play the same way we did against England but, at the same time, we must be careful not to leave possibilities for players as talented as Bernard, Willian and Neymar.
"This game is a big test and very important for our World Cup preparations. Brazil is the best team in the world now."
Former Universidad de Chile boss Sampaoli succeeded the sacked Claudio Borghi to steer Chile to the World Cup finals following an untimely blip in their qualification campaign and he praised ex-coach Marcelo Bielsa for laying the groundwork to his achievements so far.
"What Bielsa did was very valuable," said the 53-year-old, a self-confessed disciple of Bielsismo. "We are just continuing down his path.
"He and I have similar characteristics and now I have more mature players [than he did]. We have progressed but he has made it easy for us."