The most convincing evidence of Nadal's greatness relative to rivals like Fed, Djoker, and others is the high esteem in which other top players hold him. Murray, Ferrer, Berdych, Tipsarevic--all consider Nadal the toughest player to beat. And Djokovic has been quoted as saying that Nadal is the greatest player of all time. Nadal will not pass Federer but he will come close. And if he ends up with 15 majors or more, he will be GOAT because of the H2H and Fed's WEAK ERA.