Defence Secretary Philip Hammond has told Sky News he is confident troops can deliver a secure Olympics as athletes start to arrive in London for the Games.
Some 3,500 extra troops have been drafted in after security firm G4S admitted it was unable to deliver on its contract.
Speaking on Sky News' Murnaghan programme, Mr Hammond dismissed security concerns surrounding the event.
"The security required to make the Olympics safe and secure will be in place," he said.
"The army, the air force and the navy are working alongside G4S and we will ensure that the games are secure.
"There was always going to be a very significant armed forces component, it will now be a bit larger than we originally envisaged it being."
He refused to be drawn on whether troops should get an Olympic bonus, similar to the one-off £500 payment London bus drivers will receive.
"People in the armed forces are not London bus drivers. The armed forces is a contingent organisation, people who join and expect to be asked at short notice to do tasks that they have not necessarily envisaged doing."
"We will make sure, and I've already given this commitment, that nobody will be out of pocket,” he added.
Meanwhile, Culture Secretary Jeremy Hunt refused to rule out the prospect that even more troops will have to be drafted in.
When pressed on whether the 3,500 additional troops who have been brought in to make up the shortfall would be sufficient, he told BBC1's The Andrew Marr Show: "We have contingency plans for all eventualities."
G4S has a £284m contract with the Government to provide 13,700 security guards for the Olympic Games, but only 4,000 guards are trained and ready.
It is believed that the Government found out about the shortfall on Wednesday, and quickly had to boost the number of military personnel working on the Games to 17,000 - almost a fifth of the entire army.
G4S said it would see a loss on the contract of between £35m and £50m. Shares in the company were also down 1.5% when markets closed on Friday, meaning more than £150m has been wiped from its market value over the past two days.
On Saturday, G4S chief executive Nick Buckles apologised to troops returning from Afghanistan who will have to give up their leave to help secure the Games.
