There won't be any problem of course. The rankings work as they work. If player A has more points than everyone else he is #1.
But one has to wonder, with all the real vs computer #1 talk that was last year regarding Federer, what would happen if Roger became #1 last year without winning a slam? MTF would surely collapse and the haters would surely, 100%, start saying shit. I mean they said shit even when Roger won Wimbledon to become #1.
I don't think it would've been possible, he really needed those 2k points to get there, only in case Nole got injured or something. Dunno, in 2009 Del Potro won a slam but still was #5, while both Nole and Andy were higher and without a slam, I don't remember anyone saying then he's real #2