The international soccer tournament is set to begin in a few days , with Brazil and Croatia competing in the opening match on June 12 .
Referees will use vanishing spray during 2014 World Cup to stop defensive walls creeping forward at free - kicks .
The international soccer tournament is set to begin in a few days , with Brazil and Croatia competing in the opening match on June 12 .
Referees will use vanishing spray during 2014 World Cup to stop defensive walls creeping forward at free - kicks .