Boris Johnson's spokeswoman has denied claims in a Sunday newspaper that he threatened to quit as Mayor of London in a row with the Treasury.
The Sunday Times reported that Mr Johnson was furious over a possible funding gap.
The paper claimed the mayor was worried it would mean the cancellation of major transport projects and could cost him re-election.
But a spokeswoman for Mr Johnson said there was no threat.
She also denied any row with the Treasury.
He spokeswoman said: "Boris is not threatening to resign.
"He is quite confident of a good settlement for London."
The Mayor of London has no tax-raising powers and is entirely dependent on a central government grant for funding.
Mr Johnson is demanding money to pay for the £16bn Crossrail project to link east and west London by rail.
During the election the Conservatives were the only party that refused to guarantee its funding.
Mr Johnson is also asking for funds to carry out upgrades on the Tube.
Long-term rival and former mayor Ken Livingstone has said he will stand for re-election at the next mayoral election.
Mr Johnson is yet to officially confirm he will run again.