No disrespect to Fritz, who I quite like as a player, but 3600 points to get to world number 5 is a bit pitiful.
Del Potro had 6825 of them after his USO win back in 2009 and that took him into the top 5 with that haul, behind the 4 you would expect. He would have been number 1 after the USO with that total last year.