SAO PAULO: Jenson Button will only grow stronger now that he has become Formula One world champion, according to his team boss, Ross Brawn.

"Here's a guy who has never fought for a world championship before, he had a big lead and everyone is chipping away at it," he said after the Briton clinched the title with a race to spare at Sunday's Brazilian Grand Prix.

"He has come through and he is world champion and I think in that circumstance again he is going to be so much stronger," said Brawn, a winner of multiple titles with seven times champion Michael Schumacher at Benetton and Ferrari.