Brazil may prove to have been the wrong choice to host next year's World Cup if it cannot bring its protest movement under control, Fifa's head said on Wednesday.
Commenting on the protests that erupted during June's Confederations Cup – the dress rehearsal for the World Cup – Sepp Blatter, the president of Fifa which organises the tournament, said Brazil needed to prevent the unrest from recurring.
(Read More: Brazil Grapples With Biggest Protest in 2 Decades)
"If this happens again in 2014, then we might have to question whether we made the wrong decision awarding the hosting rights to Brazil," he said. "However, this will not happen. I am confident that Brazil will deliver a great Fifa World Cup."
His remarks will further strain an often rocky relationship between the Brazilian government and Fifa. The two have clashed over issues ranging from late preparations for the games to the high price of tickets.
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The government of President Dilma Rousseff is already under intense pressure to deliver difficult political and public services reforms to head off the rising discontent even as the economy is struggling.