Robin Haase

Worth the wait: Federer will be world No. 1 at 36

Roger Federer added another highlight to his age-defying career resurgence by returning to the top of the world rankings on Friday after more than five years and becoming the oldest No. 1 at 36.

"What an amazing run it's been and a journey it's been for me ... to clinch world No. 1," said Federer, who won three of the last five Grand Slams to put him on track to the top.

Beating leading Dutch player Robin Haase 4-6, 6-1, 6-1 in the quarterfinals at the ABN AMRO World Tournament means Federer becomes the oldest player - male or female - to top the tennis rankings. He surpasses Andre Agassi, who held the men's record at age 33.

"Getting to No. 1 and...