Federer makes history as he returns to No 1 at the age of 36
Roger Federer became the oldest number one singles player in history after beating Robin Haase in the ABN AMRO World Tennis Tournament quarter-finals in Rotterdam last night.
The 36-year-old Swiss, who won his 20th grand slam last month by claiming a sixth Australian Open title, replaced Rafael Nadal at the top of the ATP rankings with a 4-6 6-1 6-1 victory over Dutchman Haase.
Federer has surpassed Andre Agassi as the oldest player to occupy the summit of the men's game - the American was 33 when he was last on top in September 2003.
His return to the top spot will be formally rubber-stamped when the men's tour rankings are published on Monday morning.
Federer also beats the mark set by the record holder in the women's game, Serena Williams, who was 35 when she was last number one in May last year.
After being presented with a trophy to mark his historic achievement, Federer said: "I think reaching number one is one of, if not the ultimate achievement in our sport.
"When you are older, you feel like you have to put maybe sometimes double the work in, so this one maybe means the most to me throughout my career."