How Kaymer can be No 1
If Martin Kaymer wins or finishes tied for second with one other player in the Andalucia Masters on Sunday, he will go top of the official world rankings. If the German fails in his attempt, Lee Westwood, who is resting a calf injury, will take over from Tiger Woods as the world No 1 as his points average will be higher than Woods'.
The standings are calculated over a rolling two-year period, with points gradually diminishing in value from 13 weeks after they have first been earned. The total number of points are divided by the number of tournaments played in the last two years.