Apparently, Djokovic is guaranteed to stay at #1 till November and overtake both Nadal (102 weeks) and Borg (109 weeks) records at total weeks as #1 becoming #6 player in the Open era. amazing stuff because this record is very important when we judge someone's greatness.
1. Federer 302
2. Sampras 286
3. Lendl 270
4. Connors 268
5. McEnroe 170
6. Djokovic 110
Now, regarding Murray ... I think Nadal is the only one who can over take #2, but Rafa traditionally doesn't play that great during the second part of the season plus Murray is a better HC player IMO. Murray needs to play very well in Canada, Cinci and the USO.
Lit is really good with stats and different scenarios.