The Washington Post cited US intelligence officials as saying the UAE had orchestrated the posting of incendiary quotes attributed to Qatar’s emir that he insisted were fabricated.
The incident helped spark a diplomatic rift between Qatar and its neighbours.
UAE Minister of State for Foreign Affairs Anwar Gargash told the BBC on Monday the Post’s report was “untrue”.
He also reiterated that the UAE and five other Arab nations had not written to Fifa to demand that Qatar be stripped of the right to host the 2022 World Cup.
Swiss news network The Local said a fake news story quoting Fifa president Gianni Infantino had been posted on a copycat website on Saturday.