Race results are fairly telling at this stage of the season.
1 Djokovic, Novak (SRB) 10,410 0 14
2 Federer, Roger --(SUI) -8,895 0 17
It's interesting to me that Nole has around 1500 more points while having played 3 fewer tournaments. Usually Federer gets kudos because of his scheduling, but he's evidently felt pressed this year to keep up with Nole. Or maybe he felt that since Nole had so many points to defend, he should play everything he could in order to claim the number one spot.