Rose wilts as Immelman shines

While Immelman repeated his opening 68 for an eight-under-par total and one-stroke halfway lead over American Brandt Snedeker, Rose turned in 38, then slumped to a triple-bogey eight at the long 15th and dropped another shot on the next.

The eight came when he pitched into the water fronting the green, went long with his next attempt and then almost chipped back into the lake.

Rose finished with a 78 and fell into the pack on two over, but fellow Englishmen Ian Poulter and Paul Casey did pick up the gauntlet thrown down at the start of the day by Immelman.

Poulter followed up his opening 70 - highlighted by a hole-in-one at the 16th - with a 69 to sit alongside left-handers Steve Flesch and Phil Mickelson in third place.

Casey's closing 10-foot birdie putt, meanwhile, meant he posted a 69 for four under and joint sixth spot.

Tiger Woods improved from level par to one under with an eventful 71, but slipped from four behind to seven adrift.

He mixed four birdies with three bogeys, two of them the result of three-putting on the lightning-fast greens.

The world number one stood one over with six to play, but two-putted the 510-yard 13th, hit close at the 17th and then salvaged a remarkable par on the last.

Lee Westwood got to four under, but then came a double bogey seven on the 13th after he twice went into the creek and by missing a four-foot birdie opportunity on the last he had to settle for a 73 and two-under total. That was still good enough for a share of 11th spot.