Beating multiple slam winners in slam finals - sign of greatness!
Of course the sheer number of slams won don't tell the whole story (Eg. Hingis who most of the time beat Mauresmo types in slam finals). So we have to analyse whom the game's greats beat in their winning slam finals to get a broader picture. Beating a player in a slam final who won at least 4 slams herself in her career most surely is a sign of real greatness.
Let's have a look (open era):
Stefanie Graf beat 5 different opponents who each won 4+ slams during their careers (Navi, Evert, ASV, Seles, Hingis).
Martina Navratilova beat 3 of this rare breed (Evert, Mandlikova, Graf).
Christine Marie Evert beat 3 as well (Navi, Goolagong, Mandlikova).
Court (King, Goolagong, Evert), Seles (Graf, ASV, Navi) and Goolagong (Court, Evert, Navi) are up there with 3 too .
So it is
#1: Graf 5
#2: Navi, Evert, Court, Seles, Goolagong.
What about today's players?
Does anyone know?