Legal action threatened
The question of any shift in the calendar for the 2022 Qatar World Cup -- or, more drastically, any move to take it away from the wealthy Gulf nation -- will be closely watched around the world.
Australia, which lost out to Qatar along with South Korea, the United States and Japan, believes it should be compensated if the World Cup is held in the winter rather than the summer and has threatened legal action.
A move to the winter months could also have big cost implications for European clubs and for broadcasters. Moving matches means shifting many of the events that the latter have paid multimillions for and, importantly, would be wanting to tie up in contracts for the future.
Blatter, the FIFA president, recently said that it would not be feasible to hold a summer World Cup in Qatar. But Qatar disagrees.
Hassan al-Thawadi, secretary general of the Qatar 2022 Supreme Committee, told CNN last week that it is "absolutely not" too hot during the summer to stage the tournament then.
He acknowledged that summer in his country is hot, but said, "Other nations have hosted similar World Cups in similar if not more severe conditions."
In addition, he said, Qatar is investing in cooling technologies for stadiums, training areas and fan areas.
This, he said, "adds more confidence to us in terms of our ability to host a very successful and very memorable World Cup."