With 313 points under his belt Nadal is is the closest competitor to Federer. If he picks up a few more tournies(maybe a certain French grandslam
), he could be number 1 in the indesit race by the end of the Clay season.
Furthermore, Nadal is not defending hardly any points from 2004's clay court season so he could be number 2 in the world by the end of the year...
or if Federer plunges off the deepend in his results could Nadal be the number 1 player in the world by the end of the year?!?