Chanwan
G.O.A.T.
you don't seem to understand the question - 20 months from now is not now. For all we know, 90's clay or some other Sampras-fanatic could stab Djokovic before that/he could be in a plane crash/he could get SARS/bird flu etc.Tying Pete amazing record of 6YE#1. Huge achievement.
If he ties Sampras' 6 that is indeed a huge accomplishment.