Brazil 's Brazilian - born Eduardo da Silva reportedly will sing both national anthems . Group stage divides teams down to teams , which then enter March Madness - style matches . Since 1930 , World Cup has been held every four years except in 1942 and 1946 . Only four teams have won Cup ; Brazil has won five and now has home - field advantage .
Croatia 's Brazilian-born Eduardo da Silva reportedly will sing both national anthems . Group stage whittles teams down to 16 , which then enter March Madness-style bracket . Since 1930 , World Cup has been held every four years except in 1942 and 1946 . Only eight teams have won Cup ; Brazil has won five and now has home-field advantage .