I don't believe that Sharapova, has the consistency to be No.1 on merit. Azarenka, for me, is a better player than Sharapova. She has held the No.1 ranking for quite some time now, which in itself is not an easy thing to do. Certainly, Serena (if she could avoid injuries), would be No.1. In fact, she could well be No.1 in 24 hours (if Azarenka loses), despite suffering from injury in the last few weeks. If both Djo and Murray play at 100%, for me, there is only 1 winner - Djokovic. But certainly, there is very little in it, now. I think Murray is no longer starting the big games as underdog (as he used to). My understanding is that Murray has worked a lot on his fitness, which allows him to play a high quality game for 5 sets (2 years ago, he couldn't play high quality for more than 3 sets). I think we are in for 2 close matches in the next 48 hours.