Button warns of first corner mayhem

By Alan Baldwin

BARCELONA (Reuters) - Jenson Button fears first corner mayhem in Sunday's Spanish Grand Prix after he took pole position with Ferrari's Felipe Massa breathing down his neck.

Button, the championship leader chasing his fourth win in five races for Brawn GP, will share the front row with Red Bull's Sebastian Vettel with Brazilian team mate Rubens Barrichello directly behind.

However it will be Massa that he will be most wary of, with the Brazilian qualifying fourth on Saturday in a revamped car boosted by the KERS energy recovery system that none of those ahead of him are using.

Button measured Massa's advantage from KERS at around 10 metres, equivalent to the Ferrari driver starting in second place.

"If he gets a very good start as well it could be a problem for me," he told a post-qualifying news conference.

"I think it's just going to make it a bit crazy into turn one more than anything.

"When one car is coming into the first corner a lot quicker than the others in front of him, it could cause mayhem, especially with quite a high speed corner like this one.

"So it's about keeping your nose clean at turn one and that's going to be difficult for all of us."