Following reports he has been in contact about joining McLaren for 2010, the new world champion told British newspapers he is not afraid of lining up in the same team as Lewis Hamilton.

"I have achieved what I wanted to in F1 and I want new challenges," said the 29-year-old.  "There's no one on this grid I wouldn't go up against.  But I'm not talking about Lewis; I'm talking generally."

Button scoffed at suggestions that Brawn cannot afford to pay him more because they have now burned through the money provided by Honda amid the management buyout of last winter.

"They have just won the world (constructors') championship, you know.  There is a lot of money involved in that.  But as I have said before, money is not the most important factor for me," the Briton insisted.

He confirmed that he has been approached by some of Brawn's rival teams, but refused to name them.

"It wouldn't be fair (to name them) as I haven't yet sat down and discussed the future with my team.  We are waiting to get this race out of the way first," said Button.

He also took issue with boss Ross Brawn's comments that a new deal with Button is "99 per cent" likely.

"I wouldn't put a percentage on anything," said Button.