Djokovic will obviously overtake Borg and Nadal when it comes to weeks as #1. Can Djokovic overtake JMac? Harder to predict. The question is if he can win more than 11 slams and overtake Borg and Nadal in slam count.
it's hard to say anything about 11 slams, or whatever number of majors he will win... we can just guess
I guess he'll stay #1 for a long time, really not sure who can overtake that #1 (Fed is not playing Miami, Murray is too far behind, Nadal is a puzzle with his injuries plus he doesn't seem to care about HC any more) but it's not given ... just too many things involved when we talk about rankings. traditionally, Novak's been very good at IW and Miami. yeah, his chances are good to stay at #1 till October but we'll see ...