One of the World Cup's main sponsors has urged FIFA to properly investigate allegations of corruption being involved in Qatar's successful bid to host the 2022 tournament.

Electrical goods manufacturer Sony has stated that football's international governing body must ensure it abides by "its principles of integrity, ethics and fair play".

Sony is one of six businesses listed as a FIFA partner, putting it into the highest category of World Cup backers.

FIFA's chief investigator Michael Garcia is assessing the bidding process for the 2018 and 2022 World Cups and has said that the process will conclude by tomorrow.

US attorney Mr Garcia says he will submit a report in mid-July.

Qatar's bid committee has said it "upheld the highest standard of ethics and integrity" during the bidding process for the 2022 tournament.

One week on from its initial report, The Sunday Times has published further allegations regarding Mr Bin Hammam, including claims surrounding various business meetings.

Sony told the British newspaper: "As a FIFA partner, we expect these allegations to be investigated appropriately.

"We continue to expect FIFA to adhere to its principles of integrity, ethics and fair play across all aspects of its operations."

Following the latest reports surrounding Qatar 2022, FIFA president Sepp Blatter said on Twitter: "Never ignoring media reports on ethics allegations in football. But let the Ethics Committee work!"

Mr Bin Hammam was banned from football for life by FIFA in December 2012 over "conflicts of interest" while president of the Asian Football Confederation.