Bayern Munich president Uli Hoeness says FIFA President Sepp Blatter's reign of soccer's governing body has been further weakened by fresh corruption allegations.

"The air is getting thinner and thinner for Mr Blatter," said Hoeness, noting that Blatter looked defeated during a press briefing at FIFA's Zurich headquarters on Tuesday. "I can't imagine that he could remain in office, let alone stand for president again.

"At last, people are daring to attack him -- even international journalists."

Blatter declared on he had no reason to resign, despite revelations that his predecessor, Joao Havelange, received huge kickbacks during his time in charge of the organization.