Roger Federer becomes oldest World No.1 in tennis history
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.
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Hide AdHis 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, Agassi’s American compatriot Serena Williams, who was 35 when she was last number one in May last year.