San Jose, Costa Rica:
Blatter spoke on Thursday in the Costa Rican capital, where he was attending the Under-17 Women's World Cup.
Three World Cup stadiums are still being built in the southern cities of Sao Paulo and Curitiba, and the western city of Cuiaba.
A fourth stadium, already opened in Porto Alegre, has been slowed in a dispute about how to pay for temporary facilities for television, hospitality and security.
The World Cup starts in 10 weeks.
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