So basically before the final of tomorrow, Djokovic is over 2000 points ahead of Federer and the Swiss can only clinchs 3000 till the end of the season. So he need to win almost all his matchs with Djokovic not being in final in Paris and the Masters, and lost against Andy tomorrow...
Not 2000 points before
the final, no. If he wins it, he's more than 2000 ahead. Not if he loses. Rather moot point, though, at this stage Djokovic has all but secured YE#1 for the second time in a row. First to do so since Federer 2007 (or Wozniacki 2011 if you count WTA). My congratulations to him, well deserved.