Transport Secretary Patrick McLoughlin, revealing the report's findings to MPs in the Commons, said it made "extremely uncomfortable reading" for his department.
The ball was accidentally kicked in Kevin Nolan's face in the opening seconds of the contest - an incident that set the tone for an extremelyuncomfortable encounter for the Premier League side.
Mr Huhne, the Lib Dem energy secretary, said: "If Conservative backbenchers persist in wanting to tear up the European Convention on Human Rights, then I can foresee a time when this party would be extremelyuncomfortable in coalition, " he said.