Croatia head coach Zlatko Dalic said on Saturday that the round of 16 match against Denmark would be a fight to the death.
Croatia topped Group D with a total of nine points and will face Group C runners-up Denmark in Nizhny Novgorod on Monday morning AEST.
"It will be a challenging match and the way we play will depend on us. We need to be patient and concentrated. But when I talk about concentration I mean we won't think whether to attack or not. We will aim at control and we need to be focused even when we lose the ball. We should play attacking football. It will be a fight to the death," Dalic told journalists.
The FIFA World Cup kicked off on June 14 and will continue until July 15, with the matches being played in 11 cities across Russia.