Is Roger Federer the Best in Tennis History?

When Swiss tennis star Roger Federer won the Wimbledon Men's Championships this past Sunday, he broke Pete Sampras' all-time record of 14 grand slam singles titles and the discussion started - is Federer the "greatest ever". The remarkable Federer defeated American Andy Roddick in a five set thriller that  lasted over four hours and was capped off with an unforgettable 16-14 fifth set. This was truly one of the best matches the tennis world has ever seen - nobody could have dreamed up this one. Federer has done something no one before him has done and the total of 15 majors he now can claim is likely to grow.  The 27-year-old has a lot of tennis left to play.  Federer is one of the toughest competitors we've ever seen.  He's got a billion dollar backhand, a knack for making a big shot every time he needs to and he has increased the speed of his serve to over 130 mph. So is this man the greatest tennis player of all time?  He&...