In an interview with sports daily L'Equipe on Wednesday, the former France star who inspired his country to the 1998 World Cup title denied suggestions he received huge sums to promote the bid.
"After studying Qatar's project, I wanted to do it and I will tell you why. But first of all I want to touch upon something: money," Zidane said. "Ten, 11, 12, 13 million euros was mentioned. I will say it clearly: that's a load of rubbish. It wasn't even a third of these sums."
Qatar surprised many observers when it beat competition from the United States, Australia, South Korea and Japan to host the prestigious FIFA tournament.
Zidane acknowledged that he did get paid but said he did not benefit personally.
"It is a lot of money. But this money is distributed by the Zidane foundation (for charity)," he said. "I didn't do it for money. When I stopped playing football (in 2006), Qatar approached me and wanted me to play there. (I was offered) a blank check, I could have written whatever sum I wanted. (But) I didn't want to go and play in Qatar."
However, Zidane said he gave his word to help in the future.
"I said to these people from Qatar: 'One day I hope I can help you in a project that's beneficial for the future of sport, (and) football in particular,'" Zidane said.
"For example, the redistribution of stadiums to developing countries. People will tell me 'Qatar is tiny' but through Qatar it's the whole of the Middle East that's concerned."
Qatar's bid secured the backing of Zidane, Manchester United manager Alex Ferguson, former Netherlands defender Ronald de Boer and Barcelona manager Pep Guardiola.
"Why shouldn't they have the right to organize a World Cup?" Zidane said.
Zidane also gave his backing to France's successful bid to host the 2016 European Championships - but is bitterly angry at the team's players for going on strike at the last World Cup. The whole squad refused to train in protest after striker Nicolas Anelka was sent home from South Africa for insulting former coach Raymond Domenech.
"I don't think they yet realize what they did," Zidane said. "For them it was nothing major, when in fact it was serious."
Several players received bans, with former captain Patrice Evra handed a five-game suspension. Politicians have lined up to bash France's players, with sports minister Chantal Jouanno among those saying Evra should never play for France again.
Zidane, who starred for Real Madrid and also guided France to Euro 2000 victory during his playing career, disagrees.
"They made a mistake, they've paid for it," he said. "Everyone has the right to a second chance."
Zidane says backing Qatar bid wasn't for money
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