Barring any more injury, I'd have thought Rafa will be No 4 before too long, may even be higher after clay season. When that happens don't think ranking matters that much as any one of the top 4 wil have to beat 2 of the others to get the title.
Rafa's absence has really skewed tournaments.
That being said Nole seems to have got everyone's number at the mo., and the only person with any chance of beating him is.....the one and only Mr Murray
Of course clay....well we'll have to see there but I fancy Nole's chances there. It'll be the want that he wants most anyway.