Apparently you are supposed to be able to throw the ball of the backboard to yourself like in Practice and 1on1 mode, although I don't know how. I've tried pushing alley-oop, but he just throws an alleyoop pass to one of his teammates, even if they are behind him. I've also tried holding the right analouge stick down, but still nothing.
PUSH the right analog joystick against the joystick (am i really clear ? )
it's not down, up, right or left it's against the joystick (so push it vertically)