Share '2012 ATP World Tour Finals: results of round robin accurately mimic the world rankings?'

We have Djokovic undefeated at 3-0: Number 1 in the world. Next, we have Federer at 2-1 with 5 sets won/ 2 sets lost:  Number 2 in the world. Murray is 2-1 with 5 sets won/ 3 sets lost:  Number 3 in the world. Ferrer is also 2-1 with 4 sets won/ 3 sets lost: Number 4 in the world. Here, the man who defies this logic is Del Potro, 2-1 with 5 sets won, 3 sets lost. Would you say Del Potro deserves…