British Prime Minister David Cameron has cast doubt on his predecessor Gordon Brown being a candidate to head the International Monetary Fund.
In a BBC interview, Mr Cameron said someone who ''didn't know we had a debt problem in the UK'' might not be the best person for the job.
The BBC reports the incumbent, Dominique Strauss Kahn of France, is expected to step down soon.
Mr Brown made a speech in the United States last week, in which he admitted he made a 'big mistake' in setting up the UK's Financial Services Authority in the 1990s without appreciating the complex relations between global institutions.
This admission was seen by some commentators as part of a campaign to boost his credentials to succeed Mr Strauss Kahn as managing director.
Mr Cameron said the successful candidate could come from China or India.
''It's important that the IMF is led by someone extraordinarily competent,'' he said.
However, Labour leader Ed Miliband said Mr Brown was ''eminently qualified''.
He added that the former prime minister's role in dealing with the global economic crisis of 2007/8 had been ''outstanding''.