FIFA President Sepp Blatter says he expects the upcoming World Cup in Brazil to be a success.
Sao Paulo will host the opening game of the tournament next week but was plunged into transport chaos on Thursday as subway workers went on strike.
And this is just the latest in a series of strikes and protests which have hampered the host nation ahead of the start of the tournament next Thursday.
However, speaking at the Organising Committee News Conference in Sao Paulo on Thursday, Blatter said he was backing Brazil to deliver a well-run event.
"We at FIFA, we are confident," he said. "It will be a celebration.
"I'm an optimist. After the tournament kicks off, I think there will be a better mood."
FIFA secretary general Jerome Valcke has also guaranteed that the organisation is ready for the finals.
"We have everything ready for 12 June, we have the best base camps for the teams," said Valcke.
"There are no risks for the opening weeks of the competition, which are the most challenging because there are the most teams.
"We are in control, we have nothing to fear in the coming days."