FIFA leader Sepp Blatter on Friday defended his actions battling corruption ahead of a vote to decide on whether he remains as president of football's beleaguered world body.
But Blatter expressed doubts about timing of the arrests of seven top football officials just two days ahead of the election he has been strong favourite to win.
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"I am not saying it was a coincidence. But I do have a small question mark," the Swiss official told the start of FIFA's annual congress.
Blatter, 79, is being challenged by Prince Ali bin al Hussein, a FIFA vice president. The prince, strongly backed by Europe's football powers, has campaigned on the need for change at the top of the scandal-tainted body.
FIFA was rocked on Wednesday by the arrest of seven officials in a dawn raid on their Zurich hotel. They now face extradition to the United States where they are accused of accepting tens of millions of dollars.
Separately, Swiss investigators are looking into the awarding of the 2018 and 2022 World Cups to Russia and Qatar. The votes have also been at the centre of corruption allegations.
Blatter said the arrest of the seven at FIFA's Zurich hotel had unleashed a "storm" and that the congress has "vital decisions" to take. But he added: "I appeal for a team spirit, unity, so we can advance together. It may not be easy but that is why we are here today."
Blatter, who rejected a call to quit from UEFA president Michel Platini, repeated his case that he cannot "monitor" all of football alone and cannot be blamed for the scandals.
"The guilty ones are individuals, not the whole organisation," he insisted, calling for greater action by regional confederations and national associations "to put FIFA on the right track."
Blatter, who has confronted scandals almost since he became president in 1998, is favourite to win a fifth four-year term because he has solid support from the key African and Asian confederations which account for 100 votes among the 209 member federations.
Platini has said a "very large majority" of the 53 European federations who take part will back Prince Ali.
Blatter needs a three quarters majority to win in the first round. If it goes to a second round, a simple majority will do.
The boss of football's governing organisation remained defiant as governments joined leading figures of the global game and sponsors in crying foul over FIFA's corruption scandal.
