Ross Brawn has again re-iterated his confidence a resolution will be found with Jenson Button over his contract saga.

Brawn stated on Sunday he was "99% certain" Formula One's new world champion would re-sign with the team for 2010, despite an apparent disparity regarding his salary for next year.

Button is understood to be seeking a return to the £8million deal he enjoyed with Honda prior to their withdrawal from the sport in early December last year after taking a £5million pay-cut to drive for Brawn.

The 29-year-old, though, stated on Friday he would not wish to put any kind of percentage on his chances of staying with Brawn, adding he had been approached by other teams, albeit not naming names.

McLaren and Toyota, though, are the two teams concerned, with the rumours refusing to die down regarding a potential British 'dream team' of Hamilton and Button at the former from next year.

It would appear Brawn will have to find the cash from somewhere if he is to hang on to his star asset and the number one on the car as Button would take that with him should he drive for another team.

Asked as to why he was certain of retaining Button's services, the team principal replied: "I see the way Jenson works with the team, the way we work with him.

"I think we've given him the equipment this year to show what he can do, and he knows our plans for the future.

"We've another little matter we've got to sort out, but I'm sure we will find a resolution, so that's why I'm reasonably confident.

"I want to keep Jenson in the team, so we're working hard to find a solution to that.

"He's done a fantastic job this year, and I think he'll be even stronger in the future with this championship behind him."

Button finished second quickest to Hamilton in yesterday's first practice at the £800million motor sport paradise that is the new Yas Marina circuit, edged out by just 0.096secs.

The Briton was then third fastest during the twilight run as the track and its facilities came into their own, with Hamilton's team-mate Heikki Kovalainen spearheading a McLaren one-two with a lap of one minute 41.307secs.

Generally, all the drivers and team principals could not find any fault with the circuit, even the pit-lane tunnel exit which it was felt would be a cause for consternation.

Hamilton admitted to disliking the tunnel, and that it would be "a challenge", but overall he felt the track was "mindblowing."

"It looks like we might be quite competitive here," said Hamilton.

"The car feels great, the track is great - it's quite interesting coming from daylight into night. You don't notice the difference through the twilight.

"They've done an incredible job here. It's a great track and I really enjoy driving it."

As for Button, he added: "The Yas Marina circuit is certainly an interesting one.

"When you look at the layout it doesn't seem exciting, but when you actually drive it, it's fantastic."