ESPN: The three men who changed tennis
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ESPN) With Novak Djokovic's US Open title last year, he became the third player of this generation to reach at least 10 Grand Slam victories, joining Roger Federer (17) and Rafael Nadal (14). To put that in perspective, just two other men have won double-digit Slams, all of which have come since the start of the Open era (since 1968): Bjorn Borg (11) and Pete Sampras (14). And they didn't overlap.
Borg started winning majors in 1974 and was done by 1981. Sampras won his first in 1990 and culminated his career at the 2002 US Open with his 14th major trophy. It should be noted that Rod Laver won 11 majors, but six came before the Open era.
Federer's 17 Slam wins are the most of all time. But Nadal has won two-thirds of his head-to-head encounters with Federer (23-11). And now Djokovic, though with seven fewer Slams than Federer, has dominated both his rivals, winning nine of his past 10 matches against Nadal and beating Federer in two major finals last season. ..............(more)
http://espn.go.com/espn/feature/story/_/id/14543363/australian-open-greatest-era-tennis-history