Luke Donald became world number one for the first time today when he beat Lee Westwood – the man who held top spot – in a sudden death play-off for the BMW PGA title at Wentworth.
Ireland's Shane Lowry finished on -2, tied for fourth spot. Rory McIlroy finished on +3.
At the first extra hole Donald pitched to six feet and then Westwood, from four yards closer, saw his approach spin into the water.
Westwood took a double bogey seven and Donald won the £655,250 first prize with a birdie four.
In regulation play Donald was left with a 30-footer for victory on the final after Westwood, playing in the group ahead, had missed from six, but his two-putt par meant they tied on the six under par total of 278.
Westwood was two behind at the start of the day, but went one in front with a front nine 33 and was two clear when he birdied the 15th.
However, he then bogeyed the next and Donald hit his approach to a foot to draw level.
Westwood missed a birdie chance of under six feet on the last.
Simon Dyson, finished third on four under after a 69, while Colin Montgomerie was joint seventh – his first top 10 finish for almost three years.