As of November 2012, it is again Novac Djokovic.
Federer held top position for the few months prior
Serena Williams
Roger Federer
Andy Murray
Rafael Nadal
As he wanted to become world no1 tennis player he wanted to play... So he likes it.
Roger federer
Roger federer huge fan of him and Shawn Johnson. best atheletes ever!
P.O. Box get a life
Williams.
Lionel Messi
Payton Manning
Michael Jordan