High-flying Button out to show title credentials in Barcelona

JENSON BUTTON is ready to bare his teeth in an effort to retain his Formula One world title after revelling in the role of underdog.

The critics had a field day when Button joined McLaren, suggesting he had bitten off more than he could chew in taking on 2008 world champion Lewis Hamilton.

But the 30-year-old has so far had the last laugh, surprising many by winning two grands prix with a combination of perfectly-executed judgment calls and his smooth, incomparable style behind the wheel.