Jason Day: Becoming world number one doesn't feel real

"Just all the work ever since I was a little kid trying to get to number one in the world and today I did it."

Jason Day admitted his status as golf’s new world number one had not yet sunk in after he clinched top spot by winning the BMW Championship in Chicago on Sunday.

The US PGA Championship winner succeeded Rory McIlroy at the top of the rankings after a final round of 69 earned him a six-shot victory at Conway Farms.