I'm more interested to see how Nadal fares, if and when he returns to competitive tennis - a date which I understand has now been put back to Monte Carlo, if the rumours surrounding this are to be believed.
TMH- AO- Federer?? I find it surprising, but anything can happen. I feel that this is year will not be fed's year...
Well it did take him two and a half years before he won his last Slam, but I suppose we write him off at our peril. He's determined and he's made sure his schedule won't be too onerous. In fact this is it as of Nov. 2012 according to his official website - http://www.rogerfederer.com/en/tennis/schedule/year/2013.html
He did play six exhibitions matches in S America in December against top players so, as he's no-show in Kooyong, then, unless he changes his mind, and there's still one place available (also Nishikori may now withdraw), he must feel that that is sufficient for him before the AO.