Kaymer becomes the second German to top the rankings
Martin Kaymer has said that his move to the top of golf's world rankings is a reward for consistent hard work.
The German's progress to the WGC Match Play final ensured he would replace Lee Westwood as world number one.
And the 26-year-old USPGA champion said: "The USPGA gave me so much motivation and so much belief.
"The most important thing was that I kept working on my game, I didn't stop. I didn't want to just win once. I kept playing and kept winning."
Kaymer's 1up victory against Bubba Watson in the semi-finals in Arizona set up a final against England's Luke Donald and guaranteed he would move top of the updated rankings on Monday.
But he insisted that he would not allow becoming only the second German to top the rankings to distract from the final against Donald, who can move third in the world with victory.
"It was a long time ago, and to be the second [German - after Bernhard Langer in 1986] ) is a nice feeling.
"But it is a little strange when I hear those things, that I'm number one in the world on Monday, and I'm in the middle of the tournament.
"It would be fantastic if I could win, then it really feels like I deserve to be the number one.
"I'm not saying that I don't deserve it but it would make me feel better if I would win instead of finishing second."
Meanwhile Donald added that rankings were also not his prime concern.
"That would be an added bonus but I won't be focusing on the world rankings, those kind of things take care of themselves," he said after beating Matt Kuchar 6&5 in his semi-final.
"I'll be concentrating on trying to win and trying to pick up a trophy."