Qatar faced growing pressure over its hosting of the 2022 World Cup Sunday after fresh allegations over the role disgraced former top football official Mohammed bin Hammam played in its bid.

Last week, Britain's Sunday Times newspaper said it had obtained millions of emails, documents and bank transfers showing that bin Hammam paid over $US5 million ($5.35 million from slush funds to win support in the bidding process.

Man in the middle: Mohamed bin Hammam. Credit:AP

Now it has published new stories based on the same information which claim to detail Bin Hammam's moves in the weeks before the ballot as he sought to boost Qatar's bid.

The allegations come the day before FIFA completes its probe into the 2018 and 2022 World Cup bids, won by Russia and Qatar, chaired by former US attorney Michael Garcia.