i don't think Zidane is one of the top players in the world anymore, unfortunately his age has caught up to him. i still love watching him play though. as for roberto carlos, sure he has a heck of a shot, but remember...he's a defender. to be one of the top players in the world, you have to be one of the best at your position. there 4 or 5 other defenders i would put in front of carlos.
