FIFA expects the World Cup stadium in Sao Paulo that was damaged in a fatal construction accident to be ready by mid-April, just two months before the start of the World Cup.
FIFA President Sepp Blatter said "April 14th or 15th" is the new planned delivery date.
The Arena Corinthians stadium is due to host the June 12 opening match featuring host nation Brazil.
Blatter told a news conference that "for the time being there is no plan B" to find another stadium.
Two construction workers died last week when a crane crashed and damaged part of the stadium.