I dont think so mirkaland.
Roger's got #1 sewed up for this year, I wouldnt worry about it. Once Nadal lost at USO, Roger got it
Federer would need a semi-meltdown (by his standards) and Nadal playing fantastic on indoors for him to lose #1
Ive done the calculations already.
Fed would need to lose SF of Madrid, skip Basel, SF of Paris, and lose F in TMC
Nadal would need to win Madrid, win Paris, and go undefeated in Shanghai.
Not gonna happen