He has all the talent in the world, but his bombastic personality and a litany of off-the-court issues has so far hindered his ability to became a great player.
This is a man who once tried to get his own father ejected from a match, locked himself in his house to hide from police, and proclaimed he would be the best tennis player ever.
Going into the 2013
If he makes a deep run in his home tournament, his profile as tennis' biggest bad boy will explode.