Roger Federer said he doesn't care about ATP Rankings: "Points? Yeah, who cares? Who cares if I'm ranked 3, 5, 9? If I feel like I'm 100% fit, then I feel like I have a chance to win the tournament.
But if I don't feel that way but I'm ranked 1 or 3 or 5, whatever it may be, I know it's going to be extremely more difficult and sometimes almost impossible, even though I feel like if I'm in a draw, usually I always give myself a chance.
So rankings is not the priority unless it's battling for World No. 1, to be quite honest. But of course it can help that you might not play a certain guy earlier, but at the end of the day, I anyway feel like at one point you've got to beat them probably anyways."