PFA chief executive Gordon Taylor does not think Sepp Blatter can see out his fifth term as FIFA president.
One-time FIFA presidential candidate Luis Figo was scathing in his criticism of Sepp Blatter after the Swiss was voted in for a fifth term.
Qatar's World Cup organisers have insisted their successful bid was conducted "to the highest ethical standards".
Former FIFA vice-president Jack Warner has hit out at the United States after he was charged in a US corruption case.
A bomb threat and a political protest have disrupted FIFA's congress on the day Sepp Blatter's critics hope will signal his exit.