WRAPUP 5-Blatter defies calls to quit as FIFA scandal widens
* UEFA's Platini tells Blatter to quit
* Blatter says he cannot monitor everything
* FIFA faces warnings from sponsors
* CONCACAF names interim president
* Western politicians critical, Putin backs Blatter (Adds details on sponsors, Argentina, Brazil investigations, CONCACAF dismissing president)
By Mike Collett and Brian Homewood
ZURICH, May 28 (Reuters) - The corruption charges engulfing world soccer's governing body have heaped shame and humiliation on the game, FIFA President Sepp Blatter said on Thursday, although he flatly rejected calls to resign over the widening scandal.
With FIFA facing the worst crisis in its 111-year history, Michel Platini, who heads Europe's soccer confederation UEFA, said he had told Blatter to go "with tears in my eyes", but the 79-year-old had refused.
"I said, 'I'm asking you to leave, FIFA's image is terrible.' He said that he couldn't leave all of a sudden," Platini, a former French international, told reporters. Continuación...