There's a huge weight of expectation on the hosts, who are the favourites to win their sixth World Cup.
The match will be preceded by a spectacular opening ceremony.
Despite calls for Willian to replace his Chelsea team-mate Oscar in the side, Brazil manger Phil Scolari is expected to start with the same team that began last year's Confederations Cup final win over Spain
Croatia, meanwhile, will be without suspended striker Mario Mandzukic for tonight's match.
